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project professional 2010: independent work and duration fields RRS feed

  • Question

  • Hi,

    I need to modify the work of a task without affecting its duration. I have tried changing work and duration but they seem to be linked in a way that makes them more as if they are the same field. Whenever I change one, the other changes accordingly. I even tried increasing the %units of a resource and assigning it to a tasks with a work field larger than the duration field but this didn't solve the issue. When I assign the resource, the %units of the resource changes to 100% which is different than what was put in the resource sheet (%unit = 10,000). Is there a workaround for this or a way to fix it? I need to be able to change the work without affecting the duration.

    Regards,
    George 

    Thursday, April 28, 2011 7:18 AM

Answers

All replies

  • Hi George,

    I assume that your task type is set to Fixed Unit. Work, Duration and Unit are dependend of each other. Task Type defines, which one to keep, if a second is changed and to modify the third one. But I think it is explained better at: http://office.microsoft.com/en-us/project-help/change-the-task-type-project-uses-to-calculate-task-duration-HP010092039.aspx. If you change task type to Fixed Duration, you should be able to achieve what you are trying to do.

    Does that help?
    Barbara

    • Marked as answer by geo_d Thursday, April 28, 2011 7:47 AM
    Thursday, April 28, 2011 7:31 AM
    Moderator
  • Thank Barbara,

    I believe I was looking for the fixed duration task type. I will try it and post more questions in case I need help.

    Thanks,
    George 

    Thursday, April 28, 2011 7:47 AM
  • Hi George,
     
    Welcome to this Microsoft Project forum:)
     
    You might like to have a look at my free series for beginners on Microsoft Project in the TechTrax ezine, particularly #5 & 9, at this site: http://tinyurl.com/2xbhc  or this: http://pubs.logicalexpressions.com/Pub0009/LPMFrame.asp?CMD=ArticleSearch&AUTH=23
    (Perhaps you'd care to rate the article before leaving the site, :)  Thanks.)
     
    FAQs, companion products and other useful Project information can be seen at this web address: <http://www.mvps.org/project/>
     
    Hope this helps - please let us know how you get on :)
     
    Mike Glen
    MS Project MVP
     
     
    "geo_d" wrote in message news:afc1e4cc-7cb9-427f-9bed-62e46a9787ac@communitybridge.codeplex.com...

    Thank Barbara,

    I believe I was looking for the fixed duration task type. I will try it and post more questions in case I need help.

    Thanks,
    George

    Thursday, April 28, 2011 8:35 AM
    Moderator
  • Barbara,

    I took a look at the link in your reply of 28th April - the examples provided do not appear to exhibit the same behaviour in my copy of Microsoft Project Professional. In previous versions of Microsoft Project task types for Fixed Work and Fixed Duration Effort Driven behaved slightly differently in my experience.

    In Microsoft Project 2010 I have experienced the following:

    A task with 5 days duration and a single resource assigned 100% has 40 hours work allocated to it.

    With the Task Type set to Fixed Units Effort Driven adding an extra resource results in the duration reducing, the assigned work being shared and no impact on the originally assigned resource units of 100%. This behaves the same in 2010 as it did in 2007.

    With the Task Type set to Fixed Units NOT Effort Driven adding an extra resource results in the duration being unchanged, the assigned work being increased and no impact on the originally assigned resource units of 100%. This behaves the same in 2010 as it did in 2007.

    With the Task Type set to Fixed Duration Effort Driven adding an extra resource results in the duration being unchanged, the assigned work being shared and the originally assigned resource units of 100% being unchanged although the originally assigned resource is shown only working 4 hours per day which should be 50% allocation. In 2007 doing this resulted in the originally assigned Resource Units reducing to 50%.

    With the Task Type set to Fixed Duration NOT Effort Driven adding an extra resource results in the duration being unchanged, the assigned work being increased and no impact on the originally assigned resource units of 100%. This behaves the same in 2010 as it did in 2007.

    With the Task Type set to Fixed Work adding an extra resource results in the duration reducing, the assigned work being shared and no impact on the originally assigned resource units of 100%. This behaves the same in 2010 as it did in 2007. HOWEVER - in 2007 if you defined the work and assigned a single resource to the task the duration would increase - for example 400 hours work with a resource assigned results in the duration being 50 days, reducing the duration would result in the resource units increasing - in effect if we have a defined amount of work and we know how long we want the task to take Microsoft Project would calculate how many resources would be required, this models flexible labor such as in construction - I want a big wall built in 2 weeks, there is this much work involved in building it how many bricklayers do I need? In Project 2010 however the result when doing this is slightly different, the assigned resource units stay @ 100% but they then work extraordinary hours in the day to complete the defined work in the defined window of time.  

    I have had a good look around and cannot find anything to explain why this behaviour has been changed or why it was changed - can you enlighten me?

     


    Dominic Moss MAPM Microsoft Certified Technology Specialist Wellingtone Ltd - Your Project Management Partner - Certified Microsoft Partner Specialising in EPM/PPM - Corporate Members of the Association for Project Management [APM] - Members of the Recruitment & Employment Confederation [REC] www.wellingtone.co.uk Phone: 01753 621 203 St. Stephens House, Arthur Road, Windsor, Berkshire, SL4 1RY Exclusive articles on Project Management Recruitment, Training and consultancy. http://www.wellingtone.co.uk/blog/ Subscribe to The Wellingtone Project Management Newsletter Join the thousands of project management professionals who receive practical, straight forward advice, templates, tips and expert articles every month. http://www.wellingtone.co.uk/project_management_case_studies.php Subscribe to The Wellingtone Vacancies Bulletin Make sure you keep up-to-date on the latest permanent, contract and interim vacancies with our fortnightly bulletin. http://www.wellingtone.co.uk/project_management_jobs.php
    Friday, December 2, 2011 12:27 PM
  • Hi Dominic,

    Nice to see you :-)

    The issue of the non-changing assignment units has been a topic of very lively debate on many of the forums.  The short answer is that the assignment units are changing in both scenarios -- but the change is not reflected in the Task Form.

    See:

    http://blogs.msdn.com/b/project/archive/2010/04/29/assignment-units-in-project-2010.aspx

    I hope this helps.

    Julie

    Sunday, December 4, 2011 5:15 PM
    Moderator