Activity group levels (AC)
Activity group levels determine the structural hierarchy for activities in the activity group. Amounts and units are collected in the lowest (posting) level activities in the structure, then rolled up to the higher (summary) level activities in the structure. To determine the number of levels you need, consider the work breakdown structure and think about how you want to see activity information summarized.
Rules on setting the level size
To create activity group levels, specify a size to each level. The level size determines the maximum number of activities you can have at each level in the activity group hierarchy. For example, level 1 in the activity group structure identifies the project's phase and has been assigned a level size of 3. That means you can have up to 999 phases in the activity group.
Rules on defining the level size
These rules apply when defining level sizes:
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You can define up to five levels of activities in an activity group.
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The maximum size for any one level is 15 digits.
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Total digits for all levels in the activity group may not exceed 30. For example, if you assign 4 digits to the first level in the activity group, then you have 26 remaining digits to use in subsequent levels.
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You cannot change the size of a level once it has been defined. Ensure there is enough room specified for all the activities you need at a given level, taking future growth into consideration.
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You can define unused levels in an activity group at any time. See Maintaining activity structure.