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In P6, what is the Duration Type? What does it mean, and how does it affect the activity?

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In P6, what is the Duration Type? What does it mean, and how does it affect the activity?

19 June 2013 4:59
In P6, what is the Duration Type? What does it mean, and how does it affect the activity?
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Re: In P6, what is the Duration Type? What does it mean, and how does it affect the activity?

19 June 2013 5:03
Duration Type is a setting which allows the user to control how the duration, resource units, and resource units/time are synchronized for activities, so that the following equation is always true: Duration x Units/Time = Duration If the activity is not started, the names of the values are: Original Duration x Budgeted Units/Time = Budgeted Units If the activity has started, the names of the values are: Remaining Duration x Remaining Units/Time = Remaining Units The following table lists the value that changes to balance the equation Duration x Units/Time = Units whenever one of the variables is changed. Duration Type When You Change Duration, what changes? When you change units/time, what changes? When you change units, what changes? When you add a resource, what changes? Fixed Units/Time Units Duration Duration Duration Fixed Duration and Units/Time Units Units Units/Time Units Fixed Units Units/Time Duration Duration Duration Fixed Duration and Units Units/Time Units Units/Time Units/Time The duration type is set at the Project Details level for the Project, but can be modified per activity. Your organization’s project needs will help to determine which duration type to use. For example, if your organization is more concerned about coming in on the schedule date and within the costs (which are usually associated with the units), you would select Fixed Durations and Units. If your organization is concerned with leveling resources and you assign resources specific hours per day on activities, you would select Fixed Units/Time. As a hint, if you are adding resources to activities and you do NOT want P6 to recalculate the existing resources units, duration and units/time, go to Edit, User Preferences from the Menu bar, select the Calculations tab and select the Preserve the Units, Duration and Units/Time for existing assignments radio button.
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Re: In P6, what is the Duration Type? What does it mean, and how does it affect the activity?

19 June 2013 5:05
Duration type is the basis for estimating the selected activitys completion time. It determines whether the schedule, resource availability, or costs are most important when updating activities. The duration type applies only when you have resources assigned to the activity. Select one of the following duration types based on which factor is most important (least flexible) in planning your project: Fixed Duration & Units/Time, Fixed Duration & Units, Fixed Units/Time, or Fixed Units. Fixed Duration & Units/Time or Fixed Duration & Units: Indicate that the schedule is a limiting factor in your project. The activitys duration does not change regardless of the number of resources assigned when you modify or update activities. You usually select one of these duration types when you are using task-dependent activities. When you update the remaining duration for the activity, you can select to calculate either the remaining units or the units per timeperiod. The duration type enables you to control which variables of an equation are calculated when you change a value. If you want to recalculate the remaining units and keep the units/time for the resource constant, select Fixed Duration & Units/Time. The application uses the equation: Remaining Units = Units/Time x Remaining Duration. For example, if a resource is assigned to an activity for 8 hours/day for 5 days, the remaining units or work is calculated as 40 hours. If instead you want to keep the remaining units constant and recalculate the units/time, select Fixed Duration & Units. The application uses the equation: Units/Time = Remaining Units/Remaining Duration. For example, if a resource is assigned to work 40 hours in 5 days, the units/time is calculated as 8 hours/day. Fixed Units/Time: Indicates that resource availability is the most critical aspect of your project. In this case, the units/time or rate of the resource remains constant, even if the activitys duration or work effort changes. You most often use this duration type when you are planning resource-dependent activities. Fixed Units: Indicates that the budget (units or cost) is a limiting factor; that is, the total amount of work is fixed. When you update activities, the work effort required to complete the activity does not change, even if the activitys duration or the resource rate changes. Typically, you would use this type in conjunction with resource-dependent activities. Increasing resources can decrease the activity duration. Hope this helps, Anil Godhawale
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