The CPM Procedure

Examples: CPM Procedure

This section contains examples that illustrate several features of the CPM procedure. Most of the available options are used in at least one example. Two tables, Table 2.29 and Table 2.30, at the end of this section list all the examples in this chapter and the options and statements in the CPM procedure that are illustrated by each example.

A simple project concerning the manufacture of a widget is used in most of the examples in this section. Example 2.22 deals with a nonstandard application of PROC CPM and illustrates the richness of the modeling environment that is available with the SAS System. The last few examples use different projects to illustrate multiproject scheduling and resource-driven durations. resource calendars and negative resource requirements.

There are 14 activities in the widget manufacturing project. Example 2.1 and Example 2.2 illustrate a basic project network that is built upon by succeeding examples. The tasks in the project can be classified by the division or department that is responsible for them.

Table 2.27 lists the detailed names (and corresponding abbreviations) of all the activities in the project and the department that is responsible for each one. As in any typical project, some of these activities must be completed before others. For example, the activity 'Approve Plan' must be done before any of the activities 'Drawings', 'Anal. Market', and 'Write Specs', can start. Table 2.28 summarizes the relationships among the tasks and gives the duration in days to complete each task. This table shows the relationship among tasks by listing the immediate successors to each task.

Table 2.27: Widget Manufacture: Activity List

Table 2.28: Widget Manufacture: Precedence Information

The relationship among the tasks can be represented by the network in Figure 2.6. The diagram was produced by the NETDRAW procedure. The code used is the same as in Example 7.11 in Chapter 7, "The NETDRAW Procedure," although the colors may be different.

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Example 2.1: Activity-on-Node Representation

Example 2.2: Activity-on-Arc Representation

Example 2.3: Meeting Project Deadlines

Example 2.4: Displaying the Schedule on a Calendar

Example 2.5: Precedence Gantt Chart

Example 2.6: Changing Duration Units

Example 2.7: Controlling the Project Calendar

Example 2.8: Scheduling around Holidays

Example 2.9: CALEDATA and WORKDATA Data Sets

Example 2.10: Multiple Calendars

Example 2.11: Nonstandard Relationships

Example 2.12: Activity Time Constraints

Example 2.13: Progress Update and Target Schedules

Example 2.14: Summarizing Resource Utilization

Example 2.15: Resource Allocation

Example 2.16: Using Supplementary Resources

Example 2.17: INFEASDIAGNOSTIC Option and Aggregate Resource Type

Example 2.18: Variable Activity Delay

Example 2.19: Activity Splitting

Example 2.20: Alternate Resources

Example 2.21: PERT Assumptions and Calculations

Example 2.22: Scheduling Course - Teacher Combinations

Example 2.23: Multiproject Scheduling

Example 2.24: Resource-Driven Durations and Resource Calendars

Example 2.25: Resource-Driven Durations and Alternate Resources

Example 2.26: Multiple Alternate Resources

Example 2.27: Auxiliary Resources and Alternate Resources

Example 2.28: Use of the SETFINISHMILESTONE Option

Example 2.29: Negative Resource Requirements

Example 2.30: Auxiliary Resources and Negative Requirements

Example 2.31: Resource-Driven Durations and Negative Requirements

Statement and Option Cross-Reference Tables