Glossary of PM Terms
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- Hammocks
- A hammock groups activities, milestones, or other hammocks together for reporting. A hammock's milestone number ranges from 95 to 99. This allows for five levels of summation. For example, two hammocks at the 95 level can be combined in a 96 level hammock. Any number of hammocks are allowed within the five levels for a project. Most PM software calculates the duration of a hammock from the early and late dates of the activities to which it is linked.
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- Hard Zeros
- In resource scheduling, there is a distinction made between resource availabilities specified as zero but which can be exceeded under certain circumstances, and hard zeros, which can never be exceeded. Hard zeros may cause an activity to be impossible to schedule, in which case the resource scheduling process may be aborted.
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- Hierarchical Coding Structure
- A coding system that can be represented as a multi-level tree structure in which every code except those at the top of the tree has a parent code.
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- Highlight Report
- A highlight report reviews progress to date and highlights any actual or potential problems. The project manager prepares this report at intervals determined by the project board.
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- Histogram
- A histogram is a graphic display of resource usage over a period of time. It allows the detection of overused or underused resources. The resource usage is displayed in colored vertical bars. The ideal level for a resource on the screen is indicated by a another color (typically red). (The printed histogram uses a horizontal line to display the maximum usage set in the Resource Label window.) If the resource bar extends beyond the red area for any given day, resources need to be leveled (or spread out) for proper allocation. The resource histograms should be checked after resources are assigned to the project activities.
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- Holiday
- An otherwise valid working day that has been designated as exempt from work.
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- Hypercritical Activities
- Activities on the critical path with negative float. This can be achieved through the imposition of constraints such as target dates.
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