Simulated Processes and Tasks Analysis

Statistical data on the simulated process can be viewed either in the Simulated process statistics or Simulated sub-process statistics window (Figure 1). Open this window from the Simulation Properties Window by selecting a process and clicking on the View details hyperlink. Select a sub-process in the opened window and click on the View details hyperlink. You will open the Simulated sub-process statistics window. You can do it several times opening the inner sub-process window each time.

Figure 1. The Simulated sub-process statistics window

Both windows have the same properties. The following properties values are presented in the form of histograms:

• Duration
• Processing time
• Technological wait time
• Queue time
• Time of waiting for material resources
• Cost

Each property displays the average value. The histogram is opened by the button.

The Sub-processes tab contains the list of a simulated process immediate descendants. The tab makes it possible to identify those sub-processes whose property values led to the unsatisfactory values of the process cost and time properties.

The tab properties are the same as those of the Process statistics tab (see the Process Statistics Tab article).

Select a sub-process and click on the View details tab to open the Simulated sub-process statistics window and analyze properties of the selected sub-process.

The time and cost values of simulated processes can be unsatisfactory due to the following reasons:

• long time spent in the queue of the simulated work resources, when resource instances were either busy performing task instances of other processes or unavailable in accordance with the calendars;
• use of expensive simulated work resources for a long time.

To analyze if these are the reasons, go to the Work resources used tab of the Simulated process statistics or Simulated sub-process statistics window (Figure 2).

Figure 2. Work resources used tab

See Table 2 for the description of the tab properties.

Property	Description
Resource	Name of a simulated work resource.
Avg cost	Average cost of using a simulated work resource instance when performing a simulated process instance. Calculated in the simulation currency by the following formula: n - number of shifts of the simulated work resource Avg usage time is the average time of using simulated work resource instances of one shift when performing instances of a simulated process. Only completed instances of a simulated process are considered.
Total cost	Total cost of using simulated work resource instances when performing a simulated process instance. Calculated in the simulation currency by the following formula: n - number of shifts of the simulated work resource Total usage time is the total time of using simulated work resource instances of one shift when performing instances of a simulated process. Property value considers both completed instances of a simulated process and those that were processing at the end of the simulation.
Avg usage time	Average time of using simulated work resource instances when performing a simulated process instance. Calculated by the following formula: n - number of simulated process instances Only completed instances of a simulated process are considered.
Total usage time	Total time of using simulated work resource instances when performing simulated process instances. Calculated by the following formula: n - number of simulated process instances Property value considers both completed instances of a simulated process and those that were processing at the end of the simulation.
Avg wait time	Average time spent by a simulated process instance waiting in a queue of a simulated work resource. Calculated by formula: n - number of simulated process instances Only completed instances of a simulated process are considered.
Total wait time	Total time spent by simulated process instances waiting in a queue of a simulated work resource. Calculated by formula: n - number of simulated process instances Property value considers both completed instances of a simulated process and those that were processing at the end of the simulation.

Table 2. Properties of the "Work resources used" tab

The Work resources used tab gives you an overview of the work resources used when performing instances of the simulated process. These properties are displayed in the form of horizontal bars that helps to identify the most expansive resources or "bottlenecks" easily.

Select the work resource and click on the View details hyperlink to get more information on the resource. This will open the Work resource statistics window (see the Simulated Work Resources Analysis article for details).

The time and cost values of simulated processes can be unsatisfactory due to the following reasons:

• long time spent waiting for the simulated material resources, when their quantity was not sufficient to perform instances of the simulated processes;
• use of a big amount of expensive material resources.

To analyze if these are the reasons, go to the Material resources consumed tab of the Simulated process statistics or Simulated sub-process statistics window (Figure 3).

Figure 3. Material resources consumed tab

See Table 2 for the description of the tab properties.

Property	Description
Resource	Name of a simulated material resource.
Avg cost	Average cost of consuming a simulated material resource when performing a simulated process instance. Calculated in the simulation currency by the following formula:
Total cost	Total cost of consuming a simulated material resource when performing simulated process instances. Calculated in the simulation currency by the following formula:
Avg quantity being consumed	Average amount of a simulated material resource consumed when performing a simulated process instance. Calculated by the following formula: n - number of simulated process instances Only completed instances of a process are considered.
Total quantity consumed	Total amount of a simulated material resource consumed when performing simulated process instances. Calculated by the following formula: n - number of simulated process instances Property value considers both completed instances of a simulated process and those that were processing at the end of the simulation.
Unit	Unit of a simulated material resource quantity.
Avg wait time	Average time spent by a simulated process instance waiting for the availability of the required amount of a simulated material resource. Calculated by the following formula: n - number of simulated process instances Only completed instances of a simulated process are considered.
Total wait time	Total time spent by simulated process instances waiting for the availability of the required amount of a simulated material resource. Calculated by the following formula: n - number of simulated process instances Property value considers both completed instances of a simulated process and those that were processing at the end of the simulation.

Table 3. Properties of the "Material resources consumed" tab

Material resources consumed tab gives you an overview of the material resources used when performing instances of the simulated process. These properties are displayed in the form of horizontal bars that helps to identify the most expansive resources or "bottlenecks" easily.

Select the resource and click on the View details hyperlink to get more information on the resource. This will open the Material resource statistics window (see the Simulated Material Resources Analysis article for details).

The Fixed costs tab in the Simulated process statistics or Simulated sub-process statistics window is used to analyze the fixed costs of the simulated process instances (Figure 4).

Figure 4. Fixed costs tab

The amount of fixed costs depends on the simulation duration only. See the Example. Calculation of Fixed Costs article for an example.

Select the fixed cost item and click on the View details hyperlink to get more information. This will open the Fixed cost statistics window (see the Simulated Fixed Costs Analysis article for details).

To analyze the simulated products produced while performing instances of the simulated process, use the Products produced tab (Figure 5).

Figure 5. Products produced tab

See Table 5 for the description of the tab properties.

Property	Description
Product	Name of a simulated product.
Avg quantity being produced	Average amount of a simulated product produced when performing a simulated process instance. Calculated by the following formula: n - number of simulated process instances Only completed instances of a simulated process are considered.
Total quantity produced	Total amount of simulated product produced when performing instances of a simulated process. Calculated by the following formula: n - number of simulated process instances Property value considers both completed instances of a simulated process and those that were processing at the end of the simulation.
Unit	Unit of a simulated product quantity.

Table 5. Properties of the "Products produced" tab

Select the product and click on the View details hyperlink to get more information on it. This will open the Product statistics window (see the Simulated Products Analysis article for details).

To analyze and compare time and cost properties of the simulated process tasks, use the List of tasks hyperlink in the Simulation Properties Window.

Select a task and click on the View details hyperlink in this window to view the Simulated process statistics window (see the Simulated Processes and Tasks Analysis article for details).

You can analyze each step of each simulated process instance by means of the Process Chronology hyperlink in the Simulated process statistics or Simulated sub-process statistics window. See Figure 7 for the Process instances chronologies window.

Figure 7. Process instances chronologies window

The Comment property contains the reasons why performance of the task instance was delayed. These include:

• waiting for the work resources;
• waiting for the required amount of the material resources;
• waiting for the possibility to perform an action on the variable instance (i.e. waiting for the moment when the result value of the variable will fit the [Minimum value; Maximum value] interval).