Example 2.3: Meeting Project Deadlines

The CPM Procedure

Example 2.3: Meeting Project Deadlines

This example illustrates the use of the project finish date (using the FBDATE= option) to specify a deadline on the project. In the following program it is assumed that the project data are saved in the data set WIDGAOA. PROC CPM is first invoked with the FBDATE= option. Output 2.3.1 shows the resulting schedule. Note that the entire schedule is shifted in time (as compared to the schedule in Output 2.2.1) so that the end of the project is on March 1, 1992. The second part of the program specifies a project start date in addition to the project finish date using both the DATE= and FBDATE= options. The schedule displayed in Output 2.3.2 shows that all of the activities have a larger float than before due to the imposition of a less stringent target date.

   proc cpm data=widgaoa
            fbdate='1mar92'd interval=day;
      tailnode tail;
      headnode head;
      duration days;
      id task;
      run;

   proc sort;
      by e_start;
   run;

   options ps=60 ls=78;

   title 'Meeting Project Deadlines';
   title2 'Specification of Project Finish Date';
   proc print;
      id task;
      var e_: l_: t_float f_float;
      run;

   proc cpm data=widgaoa
            fbdate='1mar92'd
            date='2dec91'd interval=day;
      tailnode tail;
      headnode head;
      duration days;
      id task;
   run;

   proc sort;
      by e_start;
      run;

   title2 'Specifying Project Start and Completion Dates';
   proc print;
      id task;
      var e_: l_: t_float f_float;
      run;

Output 2.3.1: Meeting Project Deadlines: FBDATE= Option

Meeting Project Deadlines

Specification of Project Finish Date

task	E_START	E_FINISH	L_START	L_FINISH	T_FLOAT	F_FLOAT
Approve Plan	22DEC91	26DEC91	22DEC91	26DEC91	0	0
Drawings	27DEC91	05JAN92	27DEC91	05JAN92	0	0
Anal. Market	27DEC91	31DEC91	26JAN92	30JAN92	30	0
Write Specs	27DEC91	31DEC91	01JAN92	05JAN92	5	5
Mkt. Strat.	01JAN92	10JAN92	31JAN92	09FEB92	30	30
Prototype	06JAN92	20JAN92	06JAN92	20JAN92	0	0
Materials	21JAN92	30JAN92	21JAN92	30JAN92	0	0
Facility	21JAN92	30JAN92	21JAN92	30JAN92	0	0
Init. Prod.	31JAN92	09FEB92	31JAN92	09FEB92	0	0
Evaluate	10FEB92	19FEB92	15FEB92	24FEB92	5	5
Test Market	10FEB92	24FEB92	10FEB92	24FEB92	0	0
Marketing	10FEB92	10FEB92	01MAR92	01MAR92	20	20
Dummy	10FEB92	10FEB92	10FEB92	10FEB92	0	0
Changes	25FEB92	29FEB92	25FEB92	29FEB92	0	0
Production	01MAR92	01MAR92	01MAR92	01MAR92	0	0

Output 2.3.2: Meeting Project Deadlines: DATE= and FBDATE= Options

Meeting Project Deadlines

Specifying Project Start and Completion Dates

task	E_START	E_FINISH	L_START	L_FINISH	T_FLOAT	F_FLOAT
Approve Plan	02DEC91	06DEC91	22DEC91	26DEC91	20	0
Drawings	07DEC91	16DEC91	27DEC91	05JAN92	20	0
Anal. Market	07DEC91	11DEC91	26JAN92	30JAN92	50	0
Write Specs	07DEC91	11DEC91	01JAN92	05JAN92	25	5
Mkt. Strat.	12DEC91	21DEC91	31JAN92	09FEB92	50	30
Prototype	17DEC91	31DEC91	06JAN92	20JAN92	20	0
Materials	01JAN92	10JAN92	21JAN92	30JAN92	20	0
Facility	01JAN92	10JAN92	21JAN92	30JAN92	20	0
Init. Prod.	11JAN92	20JAN92	31JAN92	09FEB92	20	0
Evaluate	21JAN92	30JAN92	15FEB92	24FEB92	25	5
Test Market	21JAN92	04FEB92	10FEB92	24FEB92	20	0
Marketing	21JAN92	21JAN92	01MAR92	01MAR92	40	40
Dummy	21JAN92	21JAN92	10FEB92	10FEB92	20	0
Changes	05FEB92	09FEB92	25FEB92	29FEB92	20	0
Production	10FEB92	10FEB92	01MAR92	01MAR92	20	20

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