Non-work Windows


Overview

Windows are useful for modeling any period of time during which work will not be able to take place, such as shutdowns due to weather. Underneath the hood, the distribution is always triangular. 

Weather and event calendars are not applied to link gaps (GPM) or lags during simulation.

Adding Windows/Calendars

  1. Click the Non-work  icon.
  2. Click the View button above the top list and choose Non-work Windows.
  3. Click the New Calendar button.
  4. By default, a single window will be added. Fill in the minimum, most likely, and maximum start and end.

Required columns will display a Warning  icon. If none of the required columns are visible, they must be turned on (see Customizing Columns). So long as any column contains a warning, the entire row will be colored orange (for a calendar with no assignments) or red (for a calendar with assignments).

Tip

At any time, rows with warnings can be found by typing "error" or "warning" into the search box above the list.

Tip

When editing values in the table, use the right arrow key on the keyboard to advance from month to day and the TAB key to advance an entire column.

Creating Multi-year Windows

Any window which spans December 31st between the start maximum and the finish minimum must have the Recurrence set to Once and have the year incremented in order to be accepted.

Without the year, the finish would be lower than the start month and be invalid.

Tip

To create a multi-year window with yearly recurrence, you can create two windows, the first one ending at the end of the first year (December), and the second one beginning at the beginning of the next year (January).

Assigning Activities

Activity assignments can be viewed in the lower list. To force all activity assignments to the top, click the Sort icon, uncheck Organize by WBS, click Assign twice until the down arrow shows up next to it (descending order), and then scroll the list all the way to the top.

  1. Click the Non-work  icon.
  2. Click the View button above the top list and choose Non-work Windows.
  3. Select a calendar in the upper list.
  4. In the lower list, check the box in the Assign column next to the desired activity(s).

If a window is selected in the upper list, the lower list will be disabled, as activities cannot be assigned to windows themselves, only to calendars.

Interruptible vs. Continuous Activities

When confronted with a window, some activities can see their work stopped during the window and picked back up again afterwards; other activities cannot tolerate such interruptions and should not be started at all. By default, all activities in NetRisk are set as Interruptible. This can be set per assignment by clicking the dropdown in the Behavior column and choosing between Interruptible or Continuous.

In-progress activities can only be set to Interruptible.

Activity View

Whereas the Non-work Windows view is useful for assigning activities to designated calendars, the Activity View view is useful for assigning calendars to designated activities.

  1. Click the Non-work  icon.
  2. Click the View button above the top list and choose Activity View.
  3. Click the View button above the lower list and choose Non-work Windows.
  4. Select the desired activity in the upper list.
  5. In the Assign column of the lower list, check the box next to the desired calendar.

Calendars and windows cannot be modified in the Activity View.

Copy/Paste/Fill Down

Once entered, ranges can be copied and pasted or filled down to save time. For details, see Interface Tour.

Available Table Columns

For details on customizing columns, filtering, sorting, and organizing by WBS, see Interface Tour.


 Calendar/Window Columns...
ColumnDescription
Finish MaximumThe latest finish estimate.
Finish MinimumThe earliest finish estimate.
Finish Most LikelyThe most likely finish estimate.
Start MaximumThe latest start estimate.
Start MinimumThe earliest start estimate.
Start Most LikelyThe most likely start estimate.
Include in Simulation

A checkbox for controlling whether or not the calendar and its windows will be included in the simulation.

This column cannot be removed from the table.

Name

A short description of the calendar or window.

This column cannot be removed from the table.

RecurrenceA toggle for choosing whether the window will occur only once or repeat every year.

For qualitative columns, see .Non-work Windows v3.2.0.14.

 Activity Assignment Columns...
ColumnDescription
Assign

A checkbox for assigning the activity to the calendar.

This column cannot be removed from the table.

Abbr. Description

A NetPoint-unique field limited to 48 characters for describing the activity.
Behavior

How the activity will behave in conjunction with the window. When set to Continuous, the activity will be moved to start after the window. When set to Interruptible, the activity will start as scheduled, stop once it reaches the window, and continue after the window has ended.

In-progress activities can only be set to Interruptible.

Calendar

The schedule that work on the activity can take place.
Codes

A submenu containing one column for every code in the schedule.

The organization and visibility of code columns is NOT saved with the application. Code columns must be turned back on every time the tab is changed.

Completed DurationThe amount of time already completed.

Constraint #1

The primary constraint, if any. The following abbreviations are used: ALAP (As Late As Possible), MEO (Finish On), MEOA (Finish On Or After), FNL (Finish On Or Before), MS (Mandatory Start), MF (Mandatory Finish), MSO (Start On), SNE (Start On Or After), and MEOB (Start On Or Before).

Constraint #2

The secondary constraint, if any. The following abbreviations are used: ALAP (As Late As Possible), MEO (Finish On), MEOA (Finish On Or After), FNL (Finish On Or Before), MS (Mandatory Start), MF (Mandatory Finish), MSO (Start On), SNE (Start On Or After), and MEOB (Start On Or Before).
Constraint Behavior

A toggle for controlling how constraints behaves during simulation (only enabled if an activity/milestone has a constraint).

If an activity has two constraints and Maintain is chosen, both will be maintained unless one is triggered, in which case the second one will be ignored.

ALAP constraints will never be maintained and this option disabled for activities with only ALAP constraints (if an ALAP and another constraint exist and Maintain is chosen, only the other constraint will be maintained).

Description

The text field for describing the activity.

This column cannot be removed from the table when organized by WBS.

Drift

The amount of the time an activity may advance before advancing the project start.
Duration CorrelationsA summary of activities that have been correlated by ID with the coefficient showing in parenthesis.
Early FinishThe date the activity completes when its drift is equal to zero.
Early StartThe date the activity begins when its drift is equal to zero.

Finish Date

The date the activity completes. If actualized, the date is appended with an asterisk ( * ).
FloatThe amount of the time an activity may be delayed before delaying the project completion.
IDThe user-entered unique identifier.
Late FinishThe date the activity completes when its float is equal to zero.
Late StartThe date the activity begins when its float is equal to zero.

Planned Duration

The amount of time the activity takes to complete.
Remaining DurationThe total duration minus the amount of time already completed.
Resource CostThe total cost of the activity, as calculated by resource assignments.
Risk AssignmentsA summary of all risks and/or scenarios assigned by ID.
Start DateThe date the activity begins. If actualized, the date is appended with an asterisk ( * ).
Total FloatThe float + drift.
TypeThe type of object, e.g. activity, milestone, hammock, etc.
WBS SequenceA value for sorting when organized by WBS.
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