"Fixed Units/Time" – Use against a Level of Effort eg Project Manager over the duration of the Project.
"Fixed Duration & Units/Time" – Typical Construction activity, remaining duration is forecast then this activity type gives the required units/resources per remaining time period (Projecting remaining required project resources to meet schedule), productivity may also need to be considered.
"Fixed Units" – Use for High Level Schedule (perhaps Owners schedule or EPC study phase, Level 1, 2) to assist in determining the overall duration of a program by manually leveling (shrinking and stretching) activities to meet a perceived / achievable resource limit (base resource data is a high level estimate of resources).
"fixed duration and units" - Typical Shutdown / Turnaround activity, when you want to know what it will take to make sure the work is completed on time, this good for re-assessing resource requirement (resource leveling) when a shutdown is in progress.
Many arguments can be put for and against the above; however they are legitimate uses and would be best discussed with Primavera for your particular industry, also I have not looked, but I am sure many example exist on the Primavera Knowledge Base http://www.primavera.com/customer/index.asp
Whichever duration type you select will select which one of these 3 items change first. Each duration means the following:
"Fixed Units/Time" - duration changes first and the "units" change 2nd. ie. if you change the duration of an activity, the units will change accordingly (based upon the units/time already set).
"Fixed Duration & Units/Time" - "units" changes first and then duration changes 2nd.
"Fixed Units" - duration changes first and units/time changes 2nd.
"fixed duration and units" - units/time changes first and units changes 2nd.
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The first SP version was launched in 1993 and since then it has been constantly improved. Today is used in 34 countries though most Spider Project customers are in Russia. Spider Project offers numerous unique functional features and is the only PM software that optimizes resource, cost, and material constrained schedules and budgets for projects and portfolios.
The unique features of Spider Project include Quantity Based Scheduling, Conditional Scheduling, Skill Scheduling, Optimal Resource, Cost and Material Leveling, Resource Critical Path Calculation, Cash and Material Flows Calculation and Management, Trend Analysis, Advanced Risk Simulation and Analysis, Calculation of Success Probability Trends, Calculation and Management of required Project Time and Cost Buffers, Application of Corporate Norms, Management of many Parallel Budgets, Multiple WBS and many others.
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Some example uses for the Duration Types…
"Fixed Units/Time" – Use against a Level of Effort eg Project Manager over the duration of the Project.
"Fixed Duration & Units/Time" – Typical Construction activity, remaining duration is forecast then this activity type gives the required units/resources per remaining time period (Projecting remaining required project resources to meet schedule), productivity may also need to be considered.
"Fixed Units" – Use for High Level Schedule (perhaps Owners schedule or EPC study phase, Level 1, 2) to assist in determining the overall duration of a program by manually leveling (shrinking and stretching) activities to meet a perceived / achievable resource limit (base resource data is a high level estimate of resources).
"fixed duration and units" - Typical Shutdown / Turnaround activity, when you want to know what it will take to make sure the work is completed on time, this good for re-assessing resource requirement (resource leveling) when a shutdown is in progress.
Many arguments can be put for and against the above; however they are legitimate uses and would be best discussed with Primavera for your particular industry, also I have not looked, but I am sure many example exist on the Primavera Knowledge Base http://www.primavera.com/customer/index.asp
Best Regards
John
its all linear! use only fixed units!
This might help explain things...
The duration type affects the following 3 items:
"Duration"
"Units/Time"
"Units"
Whichever duration type you select will select which one of these 3 items change first. Each duration means the following:
"Fixed Units/Time" - duration changes first and the "units" change 2nd. ie. if you change the duration of an activity, the units will change accordingly (based upon the units/time already set).
"Fixed Duration & Units/Time" - "units" changes first and then duration changes 2nd.
"Fixed Units" - duration changes first and units/time changes 2nd.
"fixed duration and units" - units/time changes first and units changes 2nd.
hope this makes sense
-Pete
Hi Nitin,
You can compare with P3 autocost rules. If you in P3
1. Link RD to % complete it will give you in P5 duration type
2. Unlink RD to % complete it will give you in P5 physical type
I didnt reach to Units yet.:)
Cheers,
Aydin