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This gantt chart shows only 23 lines which is a

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Unformatted text preview: ds with the appropriate workforce rates and other financial and programmatic factors to obtain cost element estimates. These elements of cost include: NASA Systems Engineering Handbook Management Issues in Systems Engineering Desirable Features inGantt Charts The Gantt chart shown in Figure 13 (below) illustrates the following desirable features: • • • • A heading that describes the WBS element, the responsible manager, the date of the baseline used, and the date that status was reported. A milestone section in the main body (lines 1 and 2) An activity section in the main body. Activity data shown includes: a. WBS elements (lines 3, 5, 8, 12, 16, and 20) b. Activities (indented from WBS elements) c. Current plan (shown as thick bars) d. Baseline plan (same as current plan, or if different, represented by thin bars under the thick bars) e. Status line at the appropriate date f. Slack for each activity (dashed lines above the current plan bars) g. Schedule slips from the baseline (dashed lines below the milestone on line 12) A note section, where the symbols in the main body can be explained. This Gantt chart shows only 23 lines, which is a summary of the activities currently being worked for this WBS element. It is appropriate to tailor the amount of detail reported to those items most pertinent at the time of status reporting. NASA Systems Engineering Handbook Management Issues in Systems Engineering Assessing the Effect of Schedule Slippage Certain elements of cost, called fixed costs, are mainly time related, while others, called variable costs, are mainly product related. If a project's schedule is slipped, then the fixed costs of completing it increase. The variable costs remain the same in total (excluding inflation adjustments), but are deferred downstream, as in the figure below. Figure 14 -- An Example of an Unleveled Resource Profile. • • • • • • Direct labor costs Overhead costs Other direct costs (travel, data processing, etc.) Subcontract costs...
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