Overview
The below is only applicable with enabled date rollup. See Date rollup.
Should you specify no end date, duration, progress or estimated hours for an activity that has one or more sub-ones, Birdview will do it for you. The rules that govern the way an activity’s end date, progress, etc. are calculated are as follows:
Parameter | Calculation Rule | Notes |
Start Date |
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For an activity with one or more sub-activities, "Start Date" is a required field. |
End Date |
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Only top level sub-activities, that is, immediately below the parent activity hierarchically, are taken into account in the calculations. |
Duration | This value is calculated as the difference between End Date and Start Date | Expressed in days and hours. Minimum non-zero duration is 0.25 hours (15 minutes). Refer to Activity details to learn more. |
Progress | Parent activity’s progress is calculated as a weighted mean of its sub-activities’ completion rates, or , where Pi is the completion rate (progress) of the i-th sub-activity, and Di is its estimated hours. | Only top level sub-activities are taken into account in the calculations. |
Estimated Hours | These are calculated as a total of estimated hours of all sub-activities the parent activity has. | Only top level sub-activities are taken into account in the calculations. |
Changing parent activity’s start date
Example:
A parent activity had May 03, 2005 as its start date, and had a sub-activity starting on May 10, 2003. Subsequently, the parent activity’s start date was rescheduled to May 1, 2005. As a result, the sub-activity’s start date would be recalculated 2 days back, to become May 8, 2006. The sub-activity’s end date, if specified, would move back the same number of days.
Adding a sub-activity with a start date to an activity without
Activity dependency effects
Public holidays
When a public holiday falls between the start and end dates it is treated as a day off and affects the duration of the activity just like weekends do when "Treat weekends as workdays" is turned off (see Company schedule).
Accordingly, if you set a start date and a duration, the end date will be calculated taking into account the public holidays and weekends.