Example 4.13: Plotting the Resource-Constrained Schedule

The GANTT Procedure

Example 4.13: Plotting the Resource-Constrained Schedule

This example illustrates plotting the resource-constrained schedules on a Gantt chart. The schedule used is the one produced in Example 2.19 using the CPM procedure. The output data set from PROC CPM is displayed in Output 4.13.1. Notice that the activities 'Drawings' and 'Mkt. Strat.' have been split to produce a shorter project duration than if they had not been split.

PROC GANTT is invoked with all default options and an ID statement. The early/late schedule is drawn on the first bar, and the resource-constrained schedule is drawn on the second bar of each activity. The observations corresponding to the split segments of each activity have been combined to produce the plot of the resource-constrained schedule for that activity. Thus, even though the Schedule data set input to PROC GANTT contains 18 observations, the Gantt chart shows each of the 14 activities only once.

   title f=swiss 'Gantt Example 13';
   title2 f=swiss 'Resource Constrained Schedule';

   * plot the resource-constrained schedule using proc gantt;

   proc gantt data=spltschd holidata=holdata;
      chart / holiday=(hol) dur=days
              font=swiss pcompress;
      id task;
   run;

Output 4.13.1: Plotting the Resource-Constrained Schedule

Gantt Example 13

Project Schedule: Splitting Allowed

Obs	Task	succ	SEGMT_NO	days	prodman	hrdware	S_START	S_FINISH	E_START	E_FINISH	L_START	L_FINISH
1	Approve Plan	Drawings	.	5	1	.	02DEC91	06DEC91	02DEC91	06DEC91	02DEC91	06DEC91
2	Drawings	Prototype	.	10	.	1	09DEC91	24DEC91	09DEC91	20DEC91	09DEC91	20DEC91
3	Drawings	Prototype	1	2	.	1	09DEC91	10DEC91	09DEC91	20DEC91	09DEC91	20DEC91
4	Drawings	Prototype	2	8	.	1	13DEC91	24DEC91	09DEC91	20DEC91	09DEC91	20DEC91
5	Anal. Market	Mkt. Strat.	.	5	.	.	09DEC91	13DEC91	09DEC91	13DEC91	22JAN92	28JAN92
6	Write Specs	Prototype	.	5	.	.	09DEC91	13DEC91	09DEC91	13DEC91	16DEC91	20DEC91
7	Prototype	Materials	.	15	1	.	26DEC91	16JAN92	23DEC91	14JAN92	23DEC91	14JAN92
8	Mkt. Strat.	Test Market	.	10	1	.	16DEC91	21JAN92	16DEC91	30DEC91	29JAN92	11FEB92
9	Mkt. Strat.	Test Market	1	7	1	.	16DEC91	24DEC91	16DEC91	30DEC91	29JAN92	11FEB92
10	Mkt. Strat.	Test Market	2	3	1	.	17JAN92	21JAN92	16DEC91	30DEC91	29JAN92	11FEB92
11	Materials	Init. Prod.	.	10	.	.	17JAN92	30JAN92	15JAN92	28JAN92	15JAN92	28JAN92
12	Facility	Init. Prod.	.	10	.	.	17JAN92	30JAN92	15JAN92	28JAN92	15JAN92	28JAN92
13	Init. Prod.	Test Market	.	10	1	.	31JAN92	13FEB92	29JAN92	11FEB92	29JAN92	11FEB92
14	Evaluate	Changes	.	10	1	.	14FEB92	27FEB92	12FEB92	25FEB92	19FEB92	03MAR92
15	Test Market	Changes	.	15	.	.	14FEB92	05MAR92	12FEB92	03MAR92	12FEB92	03MAR92
16	Changes	Production	.	5	.	.	06MAR92	12MAR92	04MAR92	10MAR92	04MAR92	10MAR92
17	Production		.	0	1	.	13MAR92	13MAR92	11MAR92	11MAR92	11MAR92	11MAR92
18	Marketing		.	0	.	.	14FEB92	14FEB92	12FEB92	12FEB92	11MAR92	11MAR92

Output 4.13.2: Plotting the Resource-Constrained Schedule

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