VENTAJAS DE INSTALACION

specifies that every output page of the Gantt chart is to be produced maintaining the original aspect ratio of the Gantt chart. The number of output pages is deter-

mined by the HPAGES= and VPAGES= options. In the absence of the HPAGES= and VPAGES= options, the PCOMPRESS option displays the Gantt chart on a single page.

RBARHT=h

SBARHT=h

specifies that the height of the resource-constrained schedule bar be h cellheights. The value ofhis restricted to be a positive real number. The default bar height is one cellheight. This specification overrides a BARHT= specification. In the event that the resource-constrained schedule bar corresponds to the logic bar (via the LEVEL= option), the value is ignored and the default value is used instead. Any nonworking days corresponding to this schedule bar are also drawn using the same height as the schedule bar unless the HBARHT= option is specified.

RBAROFF=d

SBAROFF=d

specifies that the resource-constrained schedule bar be offsetd cellheights from its default position. A value of zero corresponds to the default position. The direction of increase is from top to bottom. This specification overrides a BAROFF= specifica- tion. In the event that the resource-constrained schedule bar corresponds to the logic bar (specified using the LEVEL= option), the value is ignored and the default value is used instead. Any nonworking days corresponding to this schedule bar are drawn using the offset of the schedule bar unless the HBAROFF= option is specified. RIGHT

RJUST

displays the Gantt chart right-justified with the right edge of the page. This option is ignored in the presence of the LEFT or LJUST option.

SHOWPREC

causes PROC GANTT to terminate in the event that a valid AOA or AON speci- fication exists, and an error occurs either in the logic system (memory allocation, data structure creation, and so on) or simply due to bad data (missing values for the ACTIVITY, TAIL, HEAD variables, and so on). The default behavior is to attempt drawing the chart without the precedence connections.

SUCCESSOR=variable

SUCC=variable

SUCCESSOR=(variables)

SUCC=(variables)

specifies the variables identifying the names of the immediate successors of the node specified by the ACTIVITY variable. This option is required when the precedence information is specified via the AON format. These variables must have the same type as the ACTIVITY variable. If the PRECDATA= option has been specified, the SUCCESSOR variables are assumed to exist in the Precedence data set; otherwise, they are assumed to exist in the Schedule data set.

TAIL=variable

TAILNODE=variable

CHART Statement 393

that represents the start of the activity. This option is required when the precedence information is specified using the AOA format. The variable can be either numeric or character in type.

TOP TJUST

positions the top of the Gantt chart at the top of the page, just below the titles. This option has priority over the BOTTOM or BJUST option.

VMILE=value

specifies a plot symbol from the font specified in the FMILE= option to be used as the milestone symbol on the chart. If the FMILE= option is set to NONE or is not specified, then the milestone symbol is the symbol specified by the VMILE= option in the special symbol table shown in Table 4.25. The default milestone symbol is a filled diamond.

VPAGES=v

Specifies that the Gantt chart is to be produced usingv vertical pages. This, however, may not be possible due to intrinsic constraints on the output. For example, the GANTT procedure requires that every vertical page represent at least one tickmark. Thus the number of vertical pages can never exceed the number of tickmarks in the axis. Subject to such inherent constraints, the GANTT procedure attempts to use the specified value for the VPAGES= option; if this fails, it usesvas an upper bound. The exact number of vertical pages used by the Gantt chart is provided in the –ORGANTT macro variable. See the “Macro Variable –ORGANTT” section on page 432. The appearance of the chart with respect to the VPAGES= option is also influenced by the presence of other related procedure options. The VPAGES= option performs the task of determining the number of horizontal pages in the absence of the HPAGES= option. If the COMPRESS or PCOMPRESS option is specified in this scenario, the chart uses one horizontal page. If neither the COMPRESS nor PCOMPRESS option is specified, the number of horizontal pages is computed in order to display as much of the chart as possible in a proportional manner.

WEB=variable

HTML=variable

specifies the character variable in the schedule data set that identifies a HTML page for each activity. The procedure generates an HTML image map using this informa- tion for all the schedule bars corresponding to an activity.

WPREC=linewidth

specifies the line width to use for drawing the precedence connections. The default width is 1.

WTNOW=linewidth

specifies the line width to use for drawing the timenow line. The default width is 4. WZONE=linewidth

WZLINE=linewidth

specifies the line width to use for drawing the horizontal zone lines which demarcate the different zones on the chart. The default linewidth is 1.

ZONE=variable

ZONEVAR=variable

names the variable in the schedule data set that is used to separate the Gantt chart into zones. This option enables you to produce a zoned Gantt chart. The GANTT proce- dure does not sort the schedule data set and processes the data in the order it appears in the schedule data set. A change in the value of the zone variable establishes a new zone. By default, the GANTT procedure displays a ZONE variable column before the ID variable columns. You can suppress this column using the NOZONECOL option. The GANTT procedure also draws a horizontal line demarcating zones. By default, the line spans the entire chart in the horizontal direction, both inside and outside the axis area. You can control the span of this line using the ZONESPAN= option. You can also adjust the vertical offset of the line from its default position by using the ZONEOFFSET= option. In addition, you can also control the graph- ical attributes associated with this line such as color, linestyle, and width using the CZONE=, LZONE=, and WZONE= options, respectively.

ZONEOFF=d

ZONEOFFSET=d

specifies the offset in cellheights of the zone line from its default position of 0.5 cell height above the top of the first schedule bar for the first activity in the zone. The default value of d is 0. The direction of increase is from top to bottom.

ZONESPAN=name

ZONELINE=name

specifies the span of the horizontal zone line that is drawn at the beginning of each new zone. Valid values for ’name’ are LEFT, RIGHT, ALL, and NONE. The value of LEFT draws a line that spans the width of the columns of text that appear on the left hand side of the Gantt chart. The value of RIGHT draws a line that spans the width of the axis area which appears on the right hand side of the chart. The value of ALL draws a line spanning both the above regions while the value of NONE suppresses the line altogether. The default value is ALL.