How to calculate the size of a project in the days-person unit of measurement?

Posted by Will Marcouiller on Programmers See other posts from Programmers or by Will Marcouiller
Published on 2011-02-18T15:28:35Z Indexed on 2011/02/18 15:33 UTC
Read the original article Hit count: 260

Filed under:

career-development

|

learning

|

project-management

Once in a while I have read here and there the size of a project expressed in a matter of days-person or person-day.

I may understand what this means, but I don't know on what do people base themselves to calculate it.

What are the variables considered into this calculation?
How these variables are used in the calculation formula?
Otherwise, how to estimate it grossly, when something is missing from the formula's variables?

Thanks! =)

© Programmers or respective owner

Related posts about career-development

Advise on career development [closed]

as seen on Programmers - Search for 'Programmers'
I am an amateur programmer working at a start-up. I didn't try coding at college. I've been working for 2 months now on web development. I'm satisfied with my progress. My project will go live soon. I work on front-end and my colleague integrates my work in his. So I decided to learn back-end technologies… >>> More
Recommendations for books on career development

as seen on Programmers - Search for 'Programmers'
For a programmer that wishes to udnerstand principles of economics/how money flows, the basic principles of money exchanging hands..what are some good books/magazines/publications/journals? Please assume a beginner level willing to learn fast and hard. The objective is to understand why some jobs… >>> More
career development: build release engineer or .net developer [closed]

as seen on Programmers - Search for 'Programmers'
I have been working as .net developer for many years. Recently I got two offers: Continue work as .net developer on a SAAS product. Job duty is to add new features and fix issues, similar to what i have been doing these years. Become a Software configuration management and build engineer, in charge… >>> More
book about psychology of decision and psychology of human

as seen on Programmers - Search for 'Programmers'
I'm a unix developer and i want to make career in project/people management as first step. I think sometimes is better to have good communication skill and in general more human skill to make career more fast. Almost in Italy, a lot of people made career development more fast for his human skill… >>> More
Learn WinRT or Unity 3d?

as seen on Programmers - Search for 'Programmers'
I am not sure where to ask advices about career development, so I am sorry if I am wrong. My question is what is better for me to learn, Win 8 and metro style applications or try to focus on some 3d engine, like Unity 3d? On the one hand I`ve got enought experience in c# and programming for business… >>> More

Related posts about learning

Machine learning challenge: diagnosing program in java/groovy (datamining, machine learning)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All! I'm planning to develop program in Java which will provide diagnosis. The data set is divided into two parts one for training and the other for testing. My program should learn to classify from the training data (BTW which contain answer for 30 questions each in new column, each record in… >>> More
what's a good language for learning machine learning?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've been thrust into a situation where I need to know something about Machine Learning. Is there a language or perhaps a reasonable tutorial that breaks this subject matter in gently? I'm not a math guy, so it's got to start from a pretty basic level. >>> More
Learning WPF and MVVM - best approach for learning from scratch

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I've got about three years c# experience. I'd like to learn some WPF and the MVVM pattern. There are a lot of links to articles on this site but I'm getting a little overwhelmed. Would a sensible approach for a begginer to be forget mvvm for a while and just quickly learn a bit a of WPF, then… >>> More
What are the advantages of Ceylon over Java?

as seen on Programmers - Search for 'Programmers'
Looking for the recent and powerful upcoming programming languages over net, I came across Ceylon. I dropped in at ceylon-lang.org and it says: Ceylon is deeply influenced by Java. You see, we're fans of Java, but we know its limitations inside out. Ceylon keeps the best bits of Java but improves… >>> More
understanding evaluation function

as seen on Programmers - Search for 'Programmers'
I am developing a chess program. And have made use of an alpha beta algorithm and a static evaluation function. I have successfully implemented both but I want to improve the evaluation function by automatically tuning the weights assigned to its features. At this point am totally confused about the… >>> More