S

S-Curve

Graphic display of cumulative costs, labor hours, or other quantities, plotted against time. The name derives from the S-like shape of the curve (flatter at the beginning and end, steeper in the middle) produced on a project that starts slowly, accelerates, and then tails off.

See project schedule.

See network analysis.

See duration compression.

Controlling changes to the project schedule.

Analyzing activity sequences, activity durations, and resource requirements to create the project schedule.

(SPI) The ratio of work performed to work scheduled (BCWP/BCWS). See earned value.

(SV) (1) Any difference between the scheduled completion of an activity and the actual completion of that activity. (2) In earned value, BCWP less BCWS.

(SF) The point in time work was scheduled to finish on an activity. The scheduled finish date is normally within the range of dates delimited by the early finish date and the late finish date.

(ISS) The point in time work was scheduled to start on an activity. The scheduled start date is normally within the range of dates delimited by the early start date and the late start date.

The sum of the products and services to be provided as a project.

See baseline.

Any change to the project scope. A scope change almost always requires an adjustment to the project cost or schedule.

Controlling changes to project scope.

Decomposing the major deliverables into smaller, more manageable components to provide better control.

Developing a written scope statement that includes the project justification, the major deliverables, and the project objectives.

Ensuring that all identified project deliverables have been completed satisfactorily.

An estimate of the cost of a product or service used to provide an assessment of the reasonableness of a prospective contractor's proposed cost.

Term used in PERT for float.

Obtaining quotations, bids, offers, or proposals as appropriate.

Documenting product requirements and identifying potential sources.

Choosing from among potential contractors.

Getting the human resources needed assigned to and working on the project.

Individuals and organizations who are involved in or may be affected by project activities.

A point in time associated with an activity's start, usually qualified by one of the following: actual, planned, estimated, scheduled, early, late, target, baseline, or current.

See logical relationship.

See logical relationship.

(SOW) A narrative description of products or services to be supplied under contract.

A subdivision of a project network diagram usually representing some form of subproject.

See subnet.

(1) In the arrow diagramming method, the activity which departs a node. (2) In the precedence diagramming method, the ''to'' activity.

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