iTaskX uses one of three task types to calculate the duration of tasks and subsequently their finish dates or their start dates. By default, after you assign a resource, the task is scheduled according to the formula Duration = Work / Units. For any task, you can choose which piece of the equation iTaskX calculates by setting the task type.
- Task Type
A characterization of a task based on which aspect of the task is fixed and which aspects are variable.
- Finish Date
The date that a task is scheduled to be completed. This date is based on the tasks start date, duration, calendars, predecessor dates, task dependencies and constraints.
- Start Date
The date when a task is scheduled to begin. This date is based on the duration, calendars and constraints of predecessor and successor tasks.
Available task types
- Fixed Unit
A task in which the assigned resources is a fixed value and any changes to the amount of work or the tasks duration do not affect the tasks units.
- Fixed Work
A task in which the amount of work is a fixed value and any changes to the tasks duration or the number of assigned resources do not affect the tasks work.
- Fixed Duration
A task in which the duration is a fixed value and any changes to the work or the assigned resources, don't affect the tasks duration.
iTaskX uses fixed units by default.
iTaskX uses a scheduling formula that relates the three values of work, duration, and assignment units: Work = Duration x Units
Here’s a handy table to help keep all the moving parts of the scheduling formula in mind:
|Task Type||You revise units...||You revise duration...||You revise work...|
|Fixed Unit||Duration is recalculated||Work is recalculated||Duration is recalculated|
|Fixed Work||Duration is recalculated||Units are recalculated||Duration is recalculated|
|Fixed Duration||Work is recalculated||Work is recalculated||Units are recalculated|
Set the task type to calculate duration:
- Select the desired task(s).
- Click on the „Entry-Info-Inspector” and select a task type in the „Task Type” pop-up („Extra” pane).
- If you choose „Fixed Work” in the „Task Type” pop-up, iTaskX can't use „Effort Driven” for the task.
- You can view and change the task type for each task directly in your view by inserting the „Type” column.