The GANTT Procedure

Example 8.6 Using the MININTERVAL= and SCALE= Options

The data sets used for this example are the same as those used to illustrate PROC CPM in Example 4.2. The data set WIDGAOA defines the project using the AOA specification. The data set DETAILS specifies the abbreviated and detailed names for each of the activities in addition to the name of the department that is responsible for that activity. Notice that a dummy activity has been added to the project in order to maintain the precedence relationships established by the WIDGET data set of the previous two examples that define the same project in AON format. The two data sets WIDGAOA and DETAILS are merged to form the WIDGETA data set that is input as the Activity data set to PROC CPM. The data set SAVE produced by PROC CPM and sorted by E_START is shown in Output 8.6.1.

Because MININTERVAL=WEEK and SCALE=10, PROC GANTT uses (1000/h)% of the screen width to denote one week, where h is the value of HPOS. Note that this choice also causes the chart to become too wide to fit on one page. Thus, PROC GANTT splits the chart into two pages. The first page contains the ID variable as well as the job number while the second page contains only the job number. The chart is split so that the displayed area on each page is approximately equal. The first two PATTERN statements, indicating the duration and slack time of noncritical activities, have been changed from the previous two examples. The duration of a noncritical activity is now indicated by a solid blue bar, and the slack time is indicated by a crosshatched blue bar.

The milestone color is changed to green using the CMILE= option. The resulting Gantt chart is shown in Output 8.6.2.

options ps=60 ls=80;

title h=2 'Gantt Example 6';
title2 h=1.5 'Using the MININTERVAL= and SCALE= Options';

data widgaoa;
   format task $12.;
   input task & days tail head;
   datalines;
Approve Plan   5   1   2
Drawings      10   2   3
Study Market   5   2   4
Write Specs    5   2   3
Prototype     15   3   5
Mkt. Strat.   10   4   6
Materials     10   5   7
Facility      10   5   7
Init. Prod.   10   7   8
Evaluate      10   8   9
Test Market   15   6   9
Changes        5   9  10
Production     0  10  11
Marketing      0   6  12
Dummy          0   8   6
;

data details;
   format task $12. dept $13. descrpt $30.;
   input task & dept & descrpt & ;
   label dept = "Department"
         descrpt = "Activity Description";
   datalines;
Approve Plan  Planning       Finalize and Approve Plan
Drawings      Engineering    Prepare Drawings
Study Market  Marketing      Analyze Potential Markets
Write Specs   Engineering    Write Specifications
Prototype     Engineering    Build Prototype
Mkt. Strat.   Marketing      Develop Marketing Concept
Materials     Manufacturing  Procure Raw Materials
Facility      Manufacturing  Prepare Manufacturing Facility
Init. Prod.   Manufacturing  Initial Production Run
Evaluate      Testing        Evaluate Product In-House
Test Market   Testing        Mail Product to Sample Market
Changes       Engineering    Engineering Changes
Production    Manufacturing  Begin Full Scale Production
Marketing     Marketing      Begin Full Scale Marketing
Dummy         .              Production Milestone
;

data widgeta;
   merge widgaoa details;
   run;

* schedule the project;
proc cpm data=widgeta date='1dec03'd out=save;
   tailnode tail;
   headnode head;
   duration days;
   id task dept descrpt;
   run;

* sort the schedule by the early start date ;
proc sort;
   by e_start;
   run;

goptions vpos=43 hpos=80;

* plot the schedule;
proc gantt graphics;
   chart / mininterval=week scale=10 dur=days
           cmile=green nolegend caxis=black
           ref='1dec03'd to '1feb04'd by month;
   id descrpt;
   run;

Output 8.6.1 Schedule Data Set SAVE

Gantt Example 6

Using the MININTERVAL= and SCALE= Options

descrpt	dept	E_START	E_FINISH	L_START	L_FINISH	T_FLOAT	F_FLOAT
Finalize and Approve Plan	Planning	01DEC03	05DEC03	01DEC03	05DEC03	0	0
Prepare Drawings	Engineering	06DEC03	15DEC03	06DEC03	15DEC03	0	0
Analyze Potential Markets	Marketing	06DEC03	10DEC03	05JAN04	09JAN04	30	0
Write Specifications	Engineering	06DEC03	10DEC03	11DEC03	15DEC03	5	5
Develop Marketing Concept	Marketing	11DEC03	20DEC03	10JAN04	19JAN04	30	30
Build Prototype	Engineering	16DEC03	30DEC03	16DEC03	30DEC03	0	0
Procure Raw Materials	Manufacturing	31DEC03	09JAN04	31DEC03	09JAN04	0	0
Prepare Manufacturing Facility	Manufacturing	31DEC03	09JAN04	31DEC03	09JAN04	0	0
Initial Production Run	Manufacturing	10JAN04	19JAN04	10JAN04	19JAN04	0	0
Evaluate Product In-House	Testing	20JAN04	29JAN04	25JAN04	03FEB04	5	5
Mail Product to Sample Market	Testing	20JAN04	03FEB04	20JAN04	03FEB04	0	0
Begin Full Scale Marketing	Marketing	20JAN04	20JAN04	09FEB04	09FEB04	20	20
Production Milestone		20JAN04	20JAN04	20JAN04	20JAN04	0	0
Engineering Changes	Engineering	04FEB04	08FEB04	04FEB04	08FEB04	0	0
Begin Full Scale Production	Manufacturing	09FEB04	09FEB04	09FEB04	09FEB04	0	0

Output 8.6.2 Using the MININTERVAL= and SCALE= Options in Graphics Mode

Using the MININTERVAL= and SCALE= Options in Graphics Mode, continued