The CPM Procedure
- Overview
- Getting Started
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Syntax
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DetailsScheduling Subject to Precedence ConstraintsUsing the INTERVAL= OptionNonstandard Precedence RelationshipsTime-Constrained SchedulingFinish MilestonesOUT= Schedule Data SetMultiple CalendarsBaseline and Target SchedulesProgress UpdatingResource-Driven Durations and Resource CalendarsResource Usage and AllocationRESOURCEOUT= Usage Data SetRESOURCESCHED= Resource Schedule Data SetMultiproject SchedulingMacro Variable _ORCPM_Input Data Sets and Related VariablesMissing Values in Input Data SetsFORMAT SpecificationComputer Resource Requirements
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ExamplesActivity-on-Node RepresentationActivity-on-Arc RepresentationMeeting Project DeadlinesDisplaying the Schedule on a CalendarPrecedence Gantt ChartChanging Duration UnitsControlling the Project CalendarScheduling around HolidaysCALEDATA and WORKDATA Data SetsMultiple CalendarsNonstandard RelationshipsActivity Time ConstraintsProgress Update and Target SchedulesSummarizing Resource UtilizationResource AllocationUsing Supplementary ResourcesINFEASDIAGNOSTIC Option and Aggregate Resource TypeVariable Activity DelayActivity SplittingAlternate ResourcesPERT Assumptions and CalculationsScheduling Course - Teacher CombinationsMultiproject SchedulingResource-Driven Durations and Resource CalendarsResource-Driven Durations and Alternate ResourcesMultiple Alternate ResourcesAuxiliary Resources and Alternate ResourcesUse of the SETFINISHMILESTONE OptionNegative Resource RequirementsAuxiliary Resources and Negative RequirementsResource-Driven Durations and Negative RequirementsStatement and Option Cross-Reference Tables
- References
This example shows how you can use the RESOURCE statement in conjunction with the RESOURCEOUT= option to summarize resource utilization. The example assumes that Engineer is a resource category and the project network (in AOA format) along with resource requirements for each activity is in a SAS data set, as displayed in Output 4.14.1.
Output 4.14.1: Resource Utilization: WIDGRES
| Summarizing Resource Utilization |
| Activity Data Set |
| Obs | task | days | tail | head | engineer |
|---|---|---|---|---|---|
| 1 | Approve Plan | 5 | 1 | 2 | 2 |
| 2 | Drawings | 10 | 2 | 3 | 1 |
| 3 | Study Market | 5 | 2 | 4 | 1 |
| 4 | Write Specs | 5 | 2 | 3 | 2 |
| 5 | Prototype | 15 | 3 | 5 | 4 |
| 6 | Mkt. Strat. | 10 | 4 | 6 | . |
| 7 | Materials | 10 | 5 | 7 | . |
| 8 | Facility | 10 | 5 | 7 | 2 |
| 9 | Init. Prod. | 10 | 7 | 8 | 4 |
| 10 | Evaluate | 10 | 8 | 9 | 1 |
| 11 | Test Market | 15 | 6 | 9 | . |
| 12 | Changes | 5 | 9 | 10 | 2 |
| 13 | Production | 0 | 10 | 11 | 4 |
| 14 | Marketing | 0 | 6 | 12 | . |
| 15 | Dummy | 0 | 8 | 6 | . |
In the following program, PROC CPM is invoked with the RESOURCE statement identifying the resource for which usage information
is required. The project is scheduled only on weekdays, and holiday information is included through the Holiday data set,
HOLDATA, which identifies two holidays, one for Christmas and one for New Year’s Day. Output 4.14.2 shows the Holiday data set.
The program saves the resource usage information in a data set named ROUT, which is displayed in Output 4.14.3. Two variables, Eengineer and Lengineer, denote the usage of the resource engineer corresponding to the early and late start schedules, respectively. Note the naming convention for the variables in the resource
usage data set: A prefix (E for Early and L for Late) is followed by the name of the resource variable, engineer. Note also
that the data set contains only observations corresponding to weekdays; by default, the _TIME_ variable in the resource usage output data set increases by one unit interval of the default calendar for every observation. Further, the MAXDATE= option is used in the RESOURCE statement to get resource
usage information only for the month of December.
proc cpm date='1dec03'd interval=weekday
resourceout=rout data=widgres
holidata=holdata;
id task;
tailnode tail;
duration days;
headnode head;
resource engineer / maxdate='31dec03'd;
holiday hol;
run;
Output 4.14.3: Resource Utilization: Resource Usage Data Set
| Summarizing Resource Utilization |
| Resource Usage |
| Obs | _TIME_ | Eengineer | Lengineer |
|---|---|---|---|
| 1 | 01DEC03 | 2 | 2 |
| 2 | 02DEC03 | 2 | 2 |
| 3 | 03DEC03 | 2 | 2 |
| 4 | 04DEC03 | 2 | 2 |
| 5 | 05DEC03 | 2 | 2 |
| 6 | 08DEC03 | 4 | 1 |
| 7 | 09DEC03 | 4 | 1 |
| 8 | 10DEC03 | 4 | 1 |
| 9 | 11DEC03 | 4 | 1 |
| 10 | 12DEC03 | 4 | 1 |
| 11 | 15DEC03 | 1 | 3 |
| 12 | 16DEC03 | 1 | 3 |
| 13 | 17DEC03 | 1 | 3 |
| 14 | 18DEC03 | 1 | 3 |
| 15 | 19DEC03 | 1 | 3 |
| 16 | 22DEC03 | 4 | 4 |
| 17 | 23DEC03 | 4 | 4 |
| 18 | 24DEC03 | 4 | 4 |
| 19 | 26DEC03 | 4 | 4 |
| 20 | 29DEC03 | 4 | 4 |
| 21 | 30DEC03 | 4 | 4 |
| 22 | 31DEC03 | 4 | 4 |
This data set can be used as input for any type of resource utilization report. In this example, the resource usage for the month of December is presented in two ways: on a calendar and in a chart. The following program prints the calendar and bar chart:
/* format the Engineer variables */
proc format;
picture efmt other='9 ESS Eng.';
picture lfmt other='9 LSS Eng.';
proc calendar legend weekdays
data=rout holidata=holdata;
id _time_;
var eengineer lengineer;
format eengineer efmt. lengineer lfmt.;
holiday hol;
holiname name;
proc chart data=rout;
hbar _time_/sumvar=eengineer discrete;
hbar _time_/sumvar=lengineer discrete;
run;
Output 4.14.4: Calendar Showing Resource Usage
| Summarizing Resource Utilization |
| Resource Usage |
-------------------------------------------------------------
| |
| December 2003 |
| |
|-----------------------------------------------------------|
| Monday | Tuesday | Wednesday | Thursday | Friday |
|-----------+-----------+-----------+-----------+-----------|
| 1 | 2 | 3 | 4 | 5 |
| | | | | |
| 2 ESS Eng | 2 ESS Eng | 2 ESS Eng | 2 ESS Eng | 2 ESS Eng |
| 2 LSS Eng | 2 LSS Eng | 2 LSS Eng | 2 LSS Eng | 2 LSS Eng |
|-----------+-----------+-----------+-----------+-----------|
| 8 | 9 | 10 | 11 | 12 |
| | | | | |
| 4 ESS Eng | 4 ESS Eng | 4 ESS Eng | 4 ESS Eng | 4 ESS Eng |
| 1 LSS Eng | 1 LSS Eng | 1 LSS Eng | 1 LSS Eng | 1 LSS Eng |
|-----------+-----------+-----------+-----------+-----------|
| 15 | 16 | 17 | 18 | 19 |
| | | | | |
| 1 ESS Eng | 1 ESS Eng | 1 ESS Eng | 1 ESS Eng | 1 ESS Eng |
| 3 LSS Eng | 3 LSS Eng | 3 LSS Eng | 3 LSS Eng | 3 LSS Eng |
|-----------+-----------+-----------+-----------+-----------|
| 22 | 23 | 24 | 25 | 26 |
| | | |*Christmas*| |
| 4 ESS Eng | 4 ESS Eng | 4 ESS Eng | | 4 ESS Eng |
| 4 LSS Eng | 4 LSS Eng | 4 LSS Eng | | 4 LSS Eng |
|-----------+-----------+-----------+-----------+-----------|
| 29 | 30 | 31 | | |
| | | | | |
| 4 ESS Eng | 4 ESS Eng | 4 ESS Eng | | |
| 4 LSS Eng | 4 LSS Eng | 4 LSS Eng | | |
-------------------------------------------------------------
|
Output 4.14.5: Bar Chart for Early Start Usage
| Summarizing Resource Utilization |
| Resource Usage |
Period Identifier ESS Usage of en
Sum
|
01DEC03 |******************** 2.000000
02DEC03 |******************** 2.000000
03DEC03 |******************** 2.000000
04DEC03 |******************** 2.000000
05DEC03 |******************** 2.000000
08DEC03 |**************************************** 4.000000
09DEC03 |**************************************** 4.000000
10DEC03 |**************************************** 4.000000
11DEC03 |**************************************** 4.000000
12DEC03 |**************************************** 4.000000
15DEC03 |********** 1.000000
16DEC03 |********** 1.000000
17DEC03 |********** 1.000000
18DEC03 |********** 1.000000
19DEC03 |********** 1.000000
22DEC03 |**************************************** 4.000000
23DEC03 |**************************************** 4.000000
24DEC03 |**************************************** 4.000000
26DEC03 |**************************************** 4.000000
29DEC03 |**************************************** 4.000000
30DEC03 |**************************************** 4.000000
31DEC03 |**************************************** 4.000000
|
----------+---------+---------+---------+
1 2 3 4
ESS Usage of engineer
|
Output 4.14.6: Bar Chart for Late Start Usage
| Summarizing Resource Utilization |
| Resource Usage |
Period Identifier LSS Usage of en
Sum
|
01DEC03 |******************** 2.000000
02DEC03 |******************** 2.000000
03DEC03 |******************** 2.000000
04DEC03 |******************** 2.000000
05DEC03 |******************** 2.000000
08DEC03 |********** 1.000000
09DEC03 |********** 1.000000
10DEC03 |********** 1.000000
11DEC03 |********** 1.000000
12DEC03 |********** 1.000000
15DEC03 |****************************** 3.000000
16DEC03 |****************************** 3.000000
17DEC03 |****************************** 3.000000
18DEC03 |****************************** 3.000000
19DEC03 |****************************** 3.000000
22DEC03 |**************************************** 4.000000
23DEC03 |**************************************** 4.000000
24DEC03 |**************************************** 4.000000
26DEC03 |**************************************** 4.000000
29DEC03 |**************************************** 4.000000
30DEC03 |**************************************** 4.000000
31DEC03 |**************************************** 4.000000
|
----------+---------+---------+---------+
1 2 3 4
LSS Usage of engineer
|
Charts such as those shown in Output 4.14.4 through Output 4.14.6 can be used to compare different schedules with respect to resource usage.