Term
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Definition
| Unique, one-time operations designed to accomplish a specific set of objectives in a limited time frame. |
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Term
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Definition
| A person who promotes and supports a project; usually resides within the organization; facilitates the work of the project by "talking up" the project. |
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Definition
| A hierarchical listing of what must be done during a project; establishes a logical framework for identifying the required activities for the project. |
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Term
| Deterministic Time Estimates |
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Definition
| Time estimates that are fairly certain. |
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| Probabilistic Time Estimates |
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Definition
| Time estimates that allow for variation. |
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Term
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Definition
The earliest time an activity can start; assumes all preceding activities start as early as possible.
For activities with one arrow entering, ES = EF of the entering arrow
For activities with multiple arrows entering, ES = the largest of the largest entering EF |
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Term
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Definition
The earliest time an activity can finish.
EF = ES + t |
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Term
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Definition
The latest time the activity can start and not delay the project.
LS = LF (the latest finishing time) - t |
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Term
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Definition
The latest time the activity can finish and not delay the project.
For nodes with one arrow leaving, LF for nodes entering that node equals the LS of the leaving arrow.
For nodes with multiple leaving arrows, LF for arrows entering equals the smallest of the leaving arrows. |
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Term
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Definition
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Term
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Definition
| Indicated by the activities with zero slack. |
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Term
| Probabilistic Time Estimates |
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Definition
Optimistic Time (To) - length of time required under optimal conditions.
Pessimistic Time (Tp) - length of time required under the worst conditions.
Most Likely Time (Tm) - the most probable length of time required. |
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Term
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Definition
Te = (To + 4Tm + Tp)/6
Path Mean = Sum of expected times of activities on the path. |
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Term
| Standard Deviation Formula |
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Definition
| Sigma^2 = [(Tp - To)/6]^2 |
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Term
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Definition
| (Specified Time - Path Mean) / Path St. Dev. |
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Term
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Definition
Assumption that path duration times are independent of each other.
Requires that activity times are independent and that each activity is on only one path. |
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Term
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Definition
| Shortening activity durations; typically involves the use of additional funds to support additional personnel or more efficient equipment and the relaxing of some work specifications. |
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