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660 Analysis
Scenario analysis
☞ The contents of the table, rather than the table itself, is copied. Thus the index of the target database variable does not change.
Diagram of sources and targets
The following diagram shows how sources and targets are related to factors and responses.
Sources for Sources for
DB variables used by model
Targets for Targets for
Sources for
Targets for
DB Factors DB Factors
DB Responses DB Responses
DB Factors
DB Responses
Target for DB Factors
Source for DB Responses
☞ Database factors are copied from the sources to the target at the start of each scenario run. Database responses are copied from the source to the targets at the end of each run.
Steps for scenario analysis
The steps for performing scenario analysis using database variables are:
1) Openamodel
2) Createtherequireddatabase,tables,fields,andrecordsforthemodel
3) Optional.IfyouplantoperformDOE,createanadditionaltableforeachdatabasevariable, where each table has a list of the possible values for that variable.
4) Createlinksbetweenthemodelandthedatabasevariables
5) EnterinformationintheDatabaseFactorstable
6) EnterinformationintheDatabaseResponsestable(thisexampledoesnotdothisstep)
7) Generateandrunthescenarios
8) Optional.Exportthereport.
☞ The above steps assume database tables are used for factors and responses. You can also use fields or records, or even entire databases, as targets and/or responses.
Open the model
In the previous tutorial you built a model using dialog variables as factors and responses. This tutorial starts where the previous tutorial ended.
☞ Instead of starting with your previous model, this tutorial uses a similar model that already has the required database structure in it.
Open the Scenario Manager Final Car Wash model (\Examples\Tutorials\Discrete Event\Scenario Manager)
Like the model you built in the previous tutorial, the Scenario Manager block in this model has:
• Four factors in its Dialog Factors table: Attendants, Wash Time, Wash&Wax Time, and Car Interarrival Time
How To

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