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  • In what areas might the use of F# be more appropriate than C#?

    - by Peter McGrattan
    Over the last few years F# has evolved into one of Microsoft's fully supported languages employing many ideas incubated in OCaml, ML and Haskell. Over the last several years C# has extended it's general purpose features by introducing more and more functional language features: LINQ (list comprehension), Lamdas, Closures, Anonymous Delegates and more... Given C#'s adoption of these functional features and F#'s taxonomy as an impure functional language (it allows YOU to access framework libraries or change shared state when a function is called if you want to) there is a strong similarity between the two languages although each has it's own polar opposite primary emphasis. I'm interested in any successful models employing these two languages in your production polyglot programs and also the areas within production software (web apps, client apps, server apps) you have written in F# in the past year or so that you would previously have written in C#. EDIT: Edited based on feedback from close votes with the intent of reducing perceived ambiguity.

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  • IoC in MVP Asp.NET

    - by Diego Dias
    Hello, Guys. I'm developing a application using MVP and I have a question about How inject my dependencis in my presenters class. Because my presente receve too an instance of the my view. I thought of create a viewbase and inside it I create my dependencies instances and inject it in my presenter instance. Could also have a HttpModule that intercept the calls to page and then I could inject my dependencies. I have some ideas but none I can inject my view in constructor only I can inject my view in mey presente by property. Someone have any ideas how do you do to inject my dependencies and my view in constructor of the presenter?

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  • Using IvyDE with different workspaces on different branches

    - by James Woods
    I am having problems using IvyDE when I have different workspaces for different branches. I have "Resolve dependencies in workspace" switched on. But everytime I change to a different workspace I have to remember to manually clean the caches out. This is because IvyDE always uses the default cache for resolving dependencies within a workspace, so when switching between workspaces the cache can be polluted by different versions. It would seem that it is impossible to work with two different workspaces at the same time. I cannot find a way to configure the location that IvyDE uses to cache the project dependencies. It does not appear to use the caches defined in the ivysettings.xml

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  • How do I give MacPorts privileges?

    - by cojadate
    I tried to install PostgreSQL server development libraries using MacPorts and got the following: Warning: MacPorts running without privileges. You may be unable to complete certain actions (e.g. install). ---> Computing dependencies for postgresql-server-devel ---> Dependencies to be installed: postgresql-devel ---> Building postgresql-devel Error: Target org.macports.build returned: shell command failed Error: The following dependencies failed to build: postgresql-devel Error: Status 1 encountered during processing. To report a bug, see <http://guide.macports.org/#project.tickets> So I guess that means I need to running MacPorts with privileges and try again. Unfortunately I've no idea how to give MacPorts privileges. I'm running OS X 10.6.3

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  • problem with uninitialized constant

    - by VinTem
    Hi, I have the following controller class ActiveUsersController < ApplicationController def edit end end And my routes.rb is like this: map.resources :active_users When I try to access the controller using the url http://localhost:3000/active_users/COo8e45RqQAHr6CqSCoI/edit I got the following error: NameError in Active usersController#edit uninitialized constant ActiveUsersController RAILS_ROOT: /Users/vintem/Documents/Projetos/Pessoal/bugfreela Application Trace | Framework Trace | Full Trace /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in load_missing_constant' /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:inconst_missing' /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in const_missing' /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/inflector.rb:361:inconstantize' /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/inflector.rb:360:in each' /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/inflector.rb:360:inconstantize' /Users/vintem/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/string/inflections.rb:162:in constantize' /Users/vintem/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:443:inrecognize' /Users/vintem/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:436:in `call' Can anyone help me? Thanks

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  • How to handle packages provided Java using Eclipse P2

    - by ctron
    I got some OSGi bundles in binary form that declare dependencies to bundles like "org.ietf.jgss" which are provided by Java itself. P2 detects these dependencies and when I try to install the product later using the P2 director application the installation fails since no bundle provides these packages. But if I use the P2 product build I get a complete installed product that I can use. My problem is that I don't want to create product files and build for each variation of the application. So tried the approach to copy all P2 repositories in order to install the product on the target system using the P2 director. So how do I handle dependencies to packages provided by Java and how to I "convince" P2 to ignore these packages if they are provided by Java itself. Thanks for helping.

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  • Is javac enough to build an OSGi bundle?

    - by Chatanga
    To produce a bundle from source using a tool such as javac, you need to provide it with a linear classpath. Unfortunately, it won't work in some situations still perfectly legal from an OSGi point of view: dependencies with embedded JAR in them; same packages contained by different dependencies. Since javac doesn't understand OSGi metadata, I won't be able to simply but the dependencies in a classpath. A finer package grained approach seems necessary. How this problem is addressed by people using OSGi in an automated process (continuous integration)? Strangely, there is a lot of resources on the web on how to create bundle JAR (creating the metadata, creating the JAR) provided you have the classes/inner JAR to put inside, but very few things on how actually get theses classes compiled.

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  • JSR-303 dependency injection and Hibernate

    - by Jam
    Spring 3.0.2, Hibernate 3.5.0, Hibernate-Validator 4.0.2.GA I am trying to inject Spring dependencies into a ConstraintValidator using: @PersistenceContext private EntityManager entityManager; I have configured the application context with: <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/> Which, according to the Spring documentation, should allow “custom ConstraintValidators to benefit from dependency injection like any other Spring bean” Within the debugger I can see Spring calling getBean to create the ConstraintValidator. Later when flush triggers the preInsert, a different ConstraintValidator is created and called. The problem is the EntityManager is null within this new ConstraintValidator. I’ve tried injecting other dependencies within the ConstraintValidator and these are always null. Does anyone know if it is possible to inject dependencies into a ConstraintValidator?

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  • How to get the right order for creation of stored procedure, user-defined functions and triggers

    - by PeeWee2201
    I read that object dependencies have been improved in SQL server 2008. I have a rather complex database schema containing stored procedure, user-defined functions, triggers. Can anybody give me a query that would return the right order of creation of those items based on their dependencies ? I read here that there are tools that can do the job, but I am looking for something scriptable. Also, they often give the dependencies of one object and I would like a database-wide solution. Thank you.

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  • What production software have you written in F# in the past year or so that you would previously hav

    - by Peter McGrattan
    Over the last few years F# has evolved into one of Microsoft's fully supported languages employing many ideas incubated in OCaml, ML and Haskell. Over the last several years C# has extended it's general purpose features by introducing more and more functional language features: LINQ (list comprehension), Lamdas, Closures, Anonymous Delegates and more... Given C#'s adoption of these functional features and F#'s taxonomy as an impure functional language (it allows YOU to access framework libraries or change shared state when a function is called if you want to) there is a strong similarity between the two languages although each has it's own polar opposite primary emphasis. I'm interested in any successful models employing these two languages in your production polyglot programs and also the areas within production software (web apps, client apps, server apps) you have written in F# in the past year or so that you would previously have written in C#.

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  • In what specific areas has F# proven more applicable than C#?

    - by Peter McGrattan
    Over the last few years F# has evolved into one of Microsoft's fully supported languages employing many ideas incubated in OCaml, ML and Haskell. Over the last several years C# has extended it's general purpose features by introducing more and more functional language features: LINQ (list comprehension), Lamdas, Closures, Anonymous Delegates and more... Given C#'s adoption of these functional features and F#'s taxonomy as an impure functional language (it allows YOU to access framework libraries or change shared state when a function is called if you want to) there is a strong similarity between the two languages although each has it's own polar opposite primary emphasis. I'm interested in any successful models employing these two languages in your production polyglot programs and also the areas within production software (web apps, client apps, server apps) you have written in F# in the past year or so that you would previously have written in C#. EDIT: Altered title with the intent of reducing perceived ambiguity.

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  • Clean way to combine multiple jars? Preferably using ant

    - by Jacob
    I have runtime dependencies on some external jars that I would like to "rejar" into a single jar. These external dependencies are stored in a external_jars directory, and I'd like to be able to not have to list each one out (e.g., to not need to change my build scripts if my dependencies change). Any thoughts? Google gave me a good answer on how to do this if you don't mind listing out each jar you want as a dependency: http://markmail.org/message/zijbwm46maxzzoo5 Roughly, I want something along the lines of the following, which would combine all jars in lib into out.jar (with some sane overwrite rules). jar -combine -out out.jar -in lib/*.jar

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  • How does Maven find a Artifact in a remote repository?

    - by Thomas
    I'm trying to create a maven plugin to generate a file with the URL to all the dependencies in a project. I have been able to get the dependencies and their artifact, but I'm having trouble getting the download URL. Using ArtifactResolver and ArticateMetadataSource I get some of the artifact information. However I fail to get all the information for all the dependencies. I haven't been able to find documentation on the resolution logic, so that I can call it form my plugin. I can use an ArtifactResolver to download the artifact, but what I really wanted was just the URL. The Maven Artifact API has a a method called getDownloadURL (see http://maven.apache.org/ref/2.0.4/maven-artifact/apidocs/org/apache/maven/artifact/Artifact.html). However I cant seem to find a way to get a real value into it. I always get a null value. Is there a way to have it resolved (downloading or not) and get the URL for where the file came from?

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  • Why maven is not working in eclipse indigo?

    - by user1067665
    I'm trying to make a simple log in/ log out web application with maven and I'm creating the project with the command: " mvn archetype:generate " and choose 341 and it'll be created with the structure below: webapp -----src/main/java -----Referenced Libraries -----Maven Dependencies -----src -----target pom.xml But when I add some dependencies and update the project something weird happening with the structure of the project according to the picture below: webapp -----src/main/java -----Referenced Libraries -----JRE System Library -----src -----target pom.xml and it's not working any more. As you can see the the first one has a Maven dependencies Library but the second one has been changed to JRE System Library. I use mac os lion and eclipse indigo. Anyone how knows why is like that? Tancks

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  • java-maven2: How to include the a jar as depedency in pom so that I will be able to access test clas

    - by flavour-of-bru
    Hi, I have a set of functional jars(more than 3) that tests my source code. These jars just contains test classes and assisting asserter classes. I am creating a new performance jar that would import all the functional tests from these jars so that all can be run simultaneously. But when I include them as test dependencies in pom of current jar, what all I get to see is the classes in src/main/java. How can I include these functional jars as dependent jars so that I can also reference classes in src/test/java. In other words, how do I reference the test classes in other jars. In what way should I include the dependency as. Thanks for your support.

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  • Game Objects Talking To Each Other

    - by PhilCK
    What is a good way of dealing with objects and having them talk to each other? Up until now all my games hobby/student have been small so this problem was generally solved in a rather ugly way, which lead to tight integration and circular dependencies. Which was fine for the size of projects I was doing. However my projects have been getting bigger in size and complexity and now I want to start re-using code, and making my head a simpler place. The main problem I have is generally along the lines of Player needs to know about the Map and so does the Enemy, this has usually descended into setting lots of pointers and having lots of dependencies, and this becomes a mess quickly. I have thought along the lines of a message style system. but I cant really see how this reduces the dependencies, as I would still be sending the pointers everywhere. Thanks. PS: I guess this has been discussed before, but I don't know what its called just the need I have.

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  • Building a jar to be used in an eclipse PDE?

    - by tul
    I have written an application that use a third party library. I have then packaged this as an executable jar using the maven-assembly-plugin (producing a jar with all dependencies including some of the third-party jars). Next I need to add this jar to a PDE project so it can be launched from eclipse. But to make this work I need to add some of the thirs-party dependencies to my PDE project which is already located in the packaged jar. So I get duplicated dependencies. Any ideas on how to avoid this? Or suggestion to documentation that describes how this is done properly?

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  • Maven2 multi-module ejb 3.1 project - deployment error

    - by gerry
    The problem is taht I get the following error qhile deploying my project to Glassfish: java.lang.RuntimeException: Unable to load EJB module. DeploymentContext does not contain any EJB Check archive to ensure correct packaging But, let us start on how the project structure looks like in Maven2... I've build the following scenario: MultiModuleJavaEEProject - parent module - model --- packaged as jar - ejb1 ---- packaged as ebj - ejb2 ---- packaged as ebj - web ---- packaged as war So model, ejb1, ejb2 and web are children/modules of the parent MultiModuleJavaEEProject. _ejb1 depends on model. _ejb2 depends on ejb1. _web depends on ejb2. the pom's look like: _parent: <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.dyndns.geraldhuber.testing</groupId> <artifactId>MultiModuleJavaEEProject</artifactId> <packaging>pom</packaging> <version>1.0</version> <name>MultiModuleJavaEEProject</name> <url>http://maven.apache.org</url> <modules> <module>model</module> <module>ejb1</module> <module>ejb2</module> <module>web</module> </modules> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.7</version> <scope>test</scope> </dependency> </dependencies> <build> <pluginManagement> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-ejb-plugin</artifactId> <version>2.2</version> <configuration> <ejbVersion>3.1</ejbVersion> <jarName>${project.groupId}.${project.artifactId}-${project.version}</jarName> </configuration> </plugin> </plugins> </pluginManagement> </build> </project> _model: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>testing</groupId> <artifactId>MultiModuleJavaEEProject</artifactId> <version>1.0</version> </parent> <artifactId>model</artifactId> <packaging>jar</packaging> <version>1.0</version> <name>model</name> <url>http://maven.apache.org</url> </project> _ejb1: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>testing</groupId> <artifactId>MultiModuleJavaEEProject</artifactId> <version>1.0</version> </parent> <artifactId>ejb1</artifactId> <packaging>ejb</packaging> <version>1.0</version> <name>ejb1</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.ejb</artifactId> <version>3.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>testing</groupId> <artifactId>model</artifactId> <version>1.0</version> </dependency> </dependencies> </project> _ejb2: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>testing</groupId> <artifactId>MultiModuleJavaEEProject</artifactId> <version>1.0</version> </parent> <artifactId>ejb2</artifactId> <packaging>ejb</packaging> <version>1.0</version> <name>ejb2</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.ejb</artifactId> <version>3.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>testing</groupId> <artifactId>ejb1</artifactId> <version>1.0</version> </dependency> </dependencies> </project> _web: <?xml version="1.0" encoding="UTF-8"?> <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion> <parent> <artifactId>MultiModuleJavaEEProject</artifactId> <groupId>testing</groupId> <version>1.0</version> </parent> <groupId>testing</groupId> <artifactId>web</artifactId> <version>1.0</version> <packaging>war</packaging> <name>web Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.4</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.ejb</artifactId> <version>3.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>testing</groupId> <artifactId>ejb2</artifactId> <version>1.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.0</version> <configuration> <archive> <manifest> <addClasspath>true</addClasspath> </manifest> </archive> </configuration> </plugin> </plugins> <finalName>web</finalName> </build> </project> And the model is just a simple Pojo: package testing.model; public class Data { private String data; public String getData() { return data; } public void setData(String data) { this.data = data; } } And the ejb1 contains only one STATELESS ejb. package testing.ejb1; import javax.ejb.Stateless; import testing.model.Data; @Stateless public class DataService { private Data data; public DataService(){ data = new Data(); data.setData("Hello World!"); } public String getDataText(){ return data.getData(); } } As well as the ejb2 is only a stateless ejb: package testing.ejb2; import javax.ejb.EJB; import javax.ejb.Stateless; import testing.ejb1.DataService; @Stateless public class Service { @EJB DataService service; public Service(){ } public String getText(){ return service.getDataText(); } } And the web module contains only a Servlet: package testing.web; import java.io.IOException; import java.io.PrintWriter; import javax.ejb.EJB; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import testing.ejb2.Service; public class SimpleServlet extends HttpServlet { @EJB Service service; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); out.println( "SimpleServlet Executed" ); out.println( "Text: "+service.getText() ); out.flush(); out.close(); } } And the web.xml file in the web module looks like: <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <servlet> <servlet-name>simple</servlet-name> <servlet-class>testing.web.SimpleServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>simple</servlet-name> <url-pattern>/simple</url-pattern> </servlet-mapping> </web-app> So no further files are set up by me. There is no ejb-jar.xml in any ejb files, because I'm using EJB 3.1. So I think ejb-jar.xml descriptors are optional. I this right? But the problem is, the already mentioned error: java.lang.RuntimeException: Unable to load EJB module. DeploymentContext does not contain any EJB Check archive to ensure correct packaging Can anybody help?

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  • Running lmgrd on ubuntu 14.04 LTS

    - by SumanBhatR
    I have installed Xilinx 14.7 in ubuntu 14.04 LTS machine(i386 - 64bit). But I am unable to run lmgrd (for starting the license server). When I googled this problem, I found that lsb-core package needs to be installed. But the package is having many dependencies, I want to know how to install lsb-core package with all the necessary dependencies. Thanks for the help On running sudo apt-get install lsb-core I got the following output Reading package lists... Done Building dependency tree Reading state information... Done Package lsb-core is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'lsb-core' has no installation candidate So I downloaded lsb-core package from http://packages.ubuntu.com/trusty/misc/lsb-core site and used "sudo dpkg -i ./lsb-core_4.1+Debian11ubuntu6_i386.deb" to install it By doing it, I got the following output Selecting previously unselected package lsb-core. (Reading database ... 163205 files and directories currently installed.) Preparing to unpack .../lsb-core_4.1+Debian11ubuntu6_i386.deb ... Unpacking lsb-core (4.1+Debian11ubuntu6) ... dpkg: dependency problems prevent configuration of lsb-core: lsb-core depends on libc6 ( 2.3.5). lsb-core depends on libz1. lsb-core depends on libncurses5. lsb-core depends on libpam0g. lsb-core depends on lsb-invalid-mta (= 4.1+Debian11ubuntu6) | mail-transport-agent. lsb-core depends on at. lsb-core depends on binutils. lsb-core depends on cron | cron-daemon. lsb-core depends on libc6-dev | libc-dev. lsb-core depends on locales. lsb-core depends on m4. lsb-core depends on mailx | mailutils. lsb-core depends on ncurses-term. lsb-core depends on pax. lsb-core depends on psmisc. lsb-core depends on alien (= 8.36). lsb-core depends on python3. lsb-core depends on lsb-security (= 4.1+Debian11ubuntu6). lsb-core depends on time. dpkg: error processing package lsb-core (--install): dependency problems - leaving unconfigured Processing triggers for man-db (2.6.7.1-1) ... Errors were encountered while processing: lsb-core So I want to know how to install lsb-core package with all the necessary dependencies in one go. Thanks for the help

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  • Error: cluster_port_ready: could not find psql binary

    - by Christoffer D. Brammer
    When I use apt-get install i get the error: Error: cluster_port_ready: could not find psql binary What do I do here? I have tried to remove PostgreSQL 8.2 but it gives this error: The following packages have unmet dependencies: postgresql-8.2: Depends: libkrb53 (>= 1.6.dfsg.1) but it is not installable Depends: postgresql-client-8.2 but it is not installable E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). And then I end up at the start, with the error when trying apt-get -f install. /Christoffer

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  • i get this error when trying to install virtual box

    - by Dave Cribbs
    Hi I am very new to Ubuntu and am not sure what I’m doing wrong.... I’m trying to install virtual box but when I do I get this dpkg: dependency problems prevent configuration of virtualbox-4.3: virtualbox-4.3 depends on psmisc. I’ve done apt-get -f install but it still says this. I don’t know what else to do please help. when I do sudo apt-get install psmisc I get this psmisc is already the newest version. You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: virtualbox-4.3:i386 : Depends: psmisc:i386 but it is not going to be installed Recommends: libsdl-ttf2.0-0:i386 but it is not going to be installed Recommends: dkms:i386 but it is not installable Recommends: linux-headers:i386 Recommends: gcc:i386 but it is not going to be installed Recommends: binutils:i386 but it is not going to be installed Recommends: pdf-viewer:i386 E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

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  • PERT shows relationships between defined tasks in a project without taking into consideration a time line

    The program evaluation and review technique (PERT) shows relationships between defined tasks in a project without taking into consideration a time line. This chart is an excellent way to identify dependencies of tasks based on other tasks. This chart allows project managers to identify the critical path of a project to minimize any time delays to the project. According to Craig Borysowich in his article “Pros & Cons of the PERT/CPM Method stated the following advantages and disadvantages: “PERT/CPM has the following advantages: A PERT/CPM chart explicitly defines and makes visible dependencies (precedence relationships) between the WBS elements, PERT/CPM facilitates identification of the critical path and makes this visible, PERT/CPM facilitates identification of early start, late start, and slack for each activity, PERT/CPM provides for potentially reduced project duration due to better understanding of dependencies leading to improved overlapping of activities and tasks where feasible.  PERT/CPM has the following disadvantages: There can be potentially hundreds or thousands of activities and individual dependency relationships, The network charts tend to be large and unwieldy requiring several pages to print and requiring special size paper, The lack of a timeframe on most PERT/CPM charts makes it harder to show status although colors can help (e.g., specific color for completed nodes), When the PERT/CPM charts become unwieldy, they are no longer used to manage the project.” (Borysowich, 2008) Traditionally PERT charts are used in the initial planning of a project like in a project that is utilizing the waterfall approach. Once the chart was created then project managers could further analyze this data to determine the earliest start time for each stage in the project. This is important because this information can be used to help forecast resource needs during a project and where in the project. However, the agile environment can approach this differently because of their constant need to be in contact with the client and the other stakeholders.  The PERT chart can also be used during project iteration to determine what is to be worked on next, such as a prioritized To-Do list a wife would give her husband at the start of a weekend. In my personal opinion, the COTS-centric environment would not really change how a company uses a PERT chart in their day to day work. The only thing I can is that there would be less tasks to include in the chart because the functionally milestones are already completed when the components are purchased. References: http://www.netmba.com/operations/project/pert/ http://web2.concordia.ca/Quality/tools/20pertchart.pdf http://it.toolbox.com/blogs/enterprise-solutions/pros-cons-of-the-pertcpm-method-22221

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  • Part 2: The Customization Lifecycle

    - by volker.eckardt(at)oracle.com
    To understand the challenges when working with Customizations better, please allow me to explain my understanding from the Customization Lifecycle.  The starting point is the functional GAP list. Any GAP can lead to a customization (but not have to). The decision is driven by priority, gain, costs, future functionality, accepted workarounds etc. Let's assume the customization has been accepted as such - including estimation. (Otherwise this blog would not have any value)Now the customization life-cycle starts and could look like this:-    Functional specification-    Technical specification-    Technical development-    Functional setup-    Module Test-    System Test-    Integration Test (if required)-    Acceptance Test-    Production mode-    Usage-    10 x Rework-    10 x Retest -    2 x Upgrade-    2 x Upgrade Test-    Usage-    10 x Rework-    10 x Retest -    1 x Upgrade-    1 x Upgrade Test-    Usage-    Review for Retirement-    Accepted Retirement-    De-installationWhat I like to highlight herewith is that any material and documentation you create upfront or during the first phases will usually be used multiple times, partial or complete, will be enhanced, reviewed, retested. The better the quality right from the beginning is, the better we can perform the next steps.What I see very often is the wish to remove a customization, our customers are upgrading and they like to get at least some of the customizations replaced with standard functionality. To be able to support this process best, the customization documentation should contain at least the following key information: What is/are the business process(es) where this customization is used or linked to?Who was involved in the different customization phases?What are the objects comprising the customization?What is the setup necessary for the customization?What setup comes with the customization, what has to be done via other tools or manually?What are the test steps and test results (in all test areas)?What are linked customizations? What is the customization complexity?How is this customization classified?Which technologies were used?How many days were needed to create/test/upgrade the customization?Etc.If all this is available, a replacement / retirement can be done much more efficient and precise, or an estimation and upgrade itself can be executed with much better support.In the following blog entries I will explain in more detail why we suggest tracking such information, by whom this task shall be done and how.Volker Eckardt

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