PROJECT Statement
PROJECT variable / options ;
PARENT variables / options ;
The PROJECT statement specifies the variable in the Activity data set that
identifies the project to which an activity belongs. This variable must be of the same
type and length as the variable defined in the ACTIVITY statement.
A project can also be treated as an activity with precedence and
time constraints. In other words, any value of the PROJECT variable
can appear as a value of the ACTIVITY variable, and it can have
specifications
for the DURATION, ALIGNDATE, ALIGNTYPE,
ACTUAL, RESOURCE, and SUCCESSOR
variables. However, some of the interpretations of these variables
for a project (or supertask) may be different from the corresponding
interpretation for an activity at the lowest level. See
the section "Multiproject Scheduling" for an explanation.
The following options can be specified in the PROJECT statement
after a slash (/).
-
AGGREGATEPARENTRES
- AGGREGATEP_RES
- AGGREGPR
-
indicates that the resource requirements for all supertasks are to be
used only for aggregation purposes and not for resource-constrained
scheduling.
-
DESCENDING
- DESC
-
indicates that, in addition to the ascending sort variables
(ES_ASC, LS_ASC, and SS_ASC) that are requested by the ESORDER, LSORDER, and
SSORDER options, the corresponding descending sort variables
(ES_DESC, LS_DESC, and
SS_DESC, respectively) are also to be added to the
Schedule output data set.
-
ESORDER
- ESO
-
indicates that a variable named ES_ASC is to be added to the
Schedule output data set; this variable can be used to order
the activities in such a way that
the activities within each subproject are in increasing order
of the early start time. This order is not necessarily
the same as the one that would be obtained by sorting all the
activities in the Schedule data set by E_START.
-
IGNOREPARENTRES
- IGNOREP_RES
- IGNOREPR
-
indicates that the resource requirements for all supertasks are to be
ignored.
-
LSORDER
- LSO
-
indicates that a variable named LS_ASC is to be added to the
Schedule output data set; this variable can be used to order
the activities in such a way that
the activities within each subproject are in increasing order
of the late start time.
-
ORDERALL
- ALL
-
is equivalent to specifying the ESORDER and LSORDER options (and the
SSORDER option when resource constrained scheduling is performed).
-
RSCHEDORDER
- RSCHDORD
- RSORDER
-
indicates that the order variables that are included in the
Schedule output data set are also to be included in the Resource
Schedule output data set.
-
RSCHEDWBS
- RSCHDWBS
- RSWBS
-
indicates that the WBS code is also to be included in the Resource
Schedule data set.
-
SEPCRIT
-
computes individual critical paths for each project. By
default, the master project's early finish time is treated as the
starting point for the calculation of the backward pass (which
calculates the late start schedule). The late finish time for
each subproject is then determined during the backward pass on the
basis of the precedence constraints.
If a time constraint is placed on the
finish time of a subproject (using the ALIGNDATE
and ALIGNTYPE
variables), the late finish time of the subproject is further
constrained by this value.
The SEPCRIT option, on the other hand, requires the late finish
time of each subproject to be less than or equal to the early finish
time of the subproject. Thus, if you
have a set of independent, parallel projects, the SEPCRIT option
enables you to compute separate critical paths for each of the
subprojects.
-
SSORDER
- SSO
-
indicates that a variable named SS_ASC is to be added to the
Schedule output data set; this variable can be used to order
the activities in such a way that
the activities within each subproject are in increasing order
of the resource-constrained start time.
-
USEPROJDUR
- USEPROJDURSPEC
- USESPECDUR
-
uses the specified subproject duration to
compute the maximum allowed late finish for each subproject.
This is similar to the SEPCRIT option, except that the specified
project duration is used to set an upper bound on each subproject's
late finish
time instead of the project span as computed from the
span of all the subtasks of the project. In other words, if
E_START and E_FINISH are the early start and finish times
of the subproject under consideration, and the subproject
duration is PROJ_DUR, where
PROJ_DUR = E_FINISH - E_START
then the SEPCRIT option sets
L_FINISH E_START + PROJ_DUR
while the USEPROJDUR option sets
L_FINISH E_START + DUR
where DUR is the duration specified for the subproject in the
Activity data set.
-
WBSCODE
- WBS
- ADDWBS
-
indicates that the CPM procedure is to compute a WBS code for the
activities in the project using the project hierarchy structure
specified. This code is computed for each activity and stored in
the variable WBS_CODE in the Schedule output data set.
Copyright © 2008 by SAS Institute Inc., Cary, NC, USA. All rights reserved.