Example 2.3: Auxiliary Resources and Alternate Resources

The CPM Procedure

Example 2.3: Auxiliary Resources and Alternate Resources

This example illustrates the use of Auxiliary resources. In the earlier examples, the use of alternate resources enabled the allocation of either John or Chris to the programming tasks. Now, suppose that each of the programmers has a different tester, and whenever a particular programmer is scheduled for a given task, his tester also needs to allocate some part of his or her time, say 50 percent, to the same task. To model such a scenario, specify Tester1 and Tester2 as auxiliary resources for Chris and John, respectively. The Activity and Resource data sets are printed in Output 2.3.1. Unlike the earlier examples, all the activities are of fixed-duration.

Output 2.3.1: Auxiliary Resources: Input Data Sets

Software Development

Alternate and Auxiliary Resources

Activity Data Set

Obs	Activity	dur	act	s1	s2	progrmr	chris	john	Tester1	Tester2
1	Plans & Reqts	2	1	2	3	1	.	.	.	.
2	Product Design	3	2	4	5	1	.	.	.	.
3	Test Plan	3	3	6	7	.	.	.	.	.
4	Documentation	3	4	9	.	1	.	.	.	.
5	Code	10	5	8	.	1	.	.	.	.
6	Test Data	5	6	8	.	.	.	.	.	.
7	Test Routines	5	7	8	.	.	.	.	.	.
8	Test Product	6	8	9	.	1	.	.	.	.
9	Finish	0	9	.	.	.	.	.	.	.

Software Development

Alternate and Auxiliary Resources

Resource Data Set

Obs	per	otype	resid	progrmr	Chris	John	Tester1	Tester2
1	.	altrate	progrmr	.	1	1	.	.
2	.	auxres	Chris	.	.	.	0.5	.
3	.	auxres	John	.	.	.	.	0.5
4	11APR00	reslevel		.	1	1	1.0	1.0

The following statements invoke PROC CPM with the appropriate data sets and resource variables. The resulting schedule is printed in Output 2.3.2. Note the auxiliary resources that have been included in the schedule corresponding to each primary resource: Tester1 whenever Chris is used, and Tester2 whenever John is allocated:

   proc cpm data=softaux out=sftaux rsched=rsftaux resin=resaux
            date='11apr00'd interval=weekday resout=raux;
      act act;
      succ s1 s2;
      dur dur;
      res progrmr Chris John Tester1 Tester2 / 
                             obstype=otype
                             period=per resid=resid
                             multalt rschedid=Activity;
      id Activity;
      run;

Output 2.3.2: Auxiliary Resources: Resource Schedule Data Set

Software Development: Alternate and Auxiliary Resources

Resource Schedule Data Set

Activity	act	RESOURCE	DUR_TYPE	dur	_WORK_	R_RATE	S_START	S_FINISH	E_START	E_FINISH	L_START	L_FINISH
Plans & Reqts	1			2	.	.	11APR00	12APR00	11APR00	12APR00	11APR00	12APR00
Plans & Reqts	1	progrmr	FIXED	2	.	1.0	.	.	11APR00	12APR00	11APR00	12APR00
Plans & Reqts	1	Tester1	FIXED	2	.	0.5	11APR00	12APR00	.	.	.	.
Plans & Reqts	1	chris	FIXED	2	.	1.0	11APR00	12APR00	.	.	.	.
Product Design	2			3	.	.	13APR00	17APR00	13APR00	17APR00	13APR00	17APR00
Product Design	2	progrmr	FIXED	3	.	1.0	.	.	13APR00	17APR00	13APR00	17APR00
Product Design	2	Tester1	FIXED	3	.	0.5	13APR00	17APR00	.	.	.	.
Product Design	2	chris	FIXED	3	.	1.0	13APR00	17APR00	.	.	.	.
Test Plan	3			3	.	.	13APR00	17APR00	13APR00	17APR00	20APR00	24APR00
Documentation	4			3	.	.	18APR00	20APR00	18APR00	20APR00	05MAY00	09MAY00
Documentation	4	progrmr	FIXED	3	.	1.0	.	.	18APR00	20APR00	05MAY00	09MAY00
Documentation	4	Tester2	FIXED	3	.	0.5	18APR00	20APR00	.	.	.	.
Documentation	4	john	FIXED	3	.	1.0	18APR00	20APR00	.	.	.	.
Code	5			10	.	.	18APR00	01MAY00	18APR00	01MAY00	18APR00	01MAY00
Code	5	progrmr	FIXED	10	.	1.0	.	.	18APR00	01MAY00	18APR00	01MAY00
Code	5	Tester1	FIXED	10	.	0.5	18APR00	01MAY00	.	.	.	.
Code	5	chris	FIXED	10	.	1.0	18APR00	01MAY00	.	.	.	.
Test Data	6			5	.	.	18APR00	24APR00	18APR00	24APR00	25APR00	01MAY00
Test Routines	7			5	.	.	18APR00	24APR00	18APR00	24APR00	25APR00	01MAY00
Test Product	8			6	.	.	02MAY00	09MAY00	02MAY00	09MAY00	02MAY00	09MAY00
Test Product	8	progrmr	FIXED	6	.	1.0	.	.	02MAY00	09MAY00	02MAY00	09MAY00
Test Product	8	Tester1	FIXED	6	.	0.5	02MAY00	09MAY00	.	.	.	.
Test Product	8	chris	FIXED	6	.	1.0	02MAY00	09MAY00	.	.	.	.
Finish	9			0	.	.	10MAY00	10MAY00	10MAY00	10MAY00	10MAY00	10MAY00

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