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The CLP Procedure

ACTIVITY Statement

ACTIVITY specification <...> ;
An ACTIVITY specification can be one of the following types:

activity <= ( <DUR=> duration <type=date ...>)>

(activity_list) <= ( <DUR=> duration <type=date ...>)>

where duration is the activity duration and type is a keyword specifying an alignment-type constraint on the activity (or activities) with respect to the date given by date.

The ACTIVITY statement defines one or more activities and the attributes of each activity, such as the duration and any temporal constraints of the time alignment type. The default duration is 0.

Valid type keywords are as follows:

  • SGE, start greater than or equal to date

  • SLE, start less than or equal to date

  • FGE, finish greater than or equal to date

  • FLE, finish less than or equal to date

You can specify any combination of the preceding keywords. For example, to define activities A1, A2, A3, B1, and B3 with duration 3, and to set the start time of these activities equal to 10, you would specify the following:

   activity (A1-A3 B1 B3) = ( dur=3 sge=10 sle=10 );

You can alternatively use the ACTDATA= data set to define the activities, durations, and temporal constraints. In fact, you can specify both an ACTIVITY statement and an ACTDATA= data set. You must use an ACTDATA= data set to define precedence-related temporal constraints. The SCHEDDATA= option must be specified when the ACTIVITY statement is used.

Note: This procedure is experimental.

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