Property
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Description
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Mission time (hours)
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Indicates the operating time value in hours at which to calculate reliability. The default is 100. This property is shown when the Project is to include any of the following modules: FMEA, Maintainability, or Prediction. It sets the value for Mission Time in the Project’s Mission Profile file.
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Failure rate multiplier
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The units in which to display the failure rate. The default is 1000000 because several commonly used reliability prediction models base their calculations on failures per million (FPM) hours. However, you can change the units. For example, you might change the units to 1000000000 to base calculations on failures per billion hours, which is also known as FITS (failures in time). This property sets Failure Rate Multiplier under General in the System file properties. For more information, see General System File Properties.
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Enable Master Filter file
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Indicates whether to enable the Master Filter file so that all supplied filters are available for selection. For more information, see Filters. When this checkbox is selected (default), the Master Filter file is enabled.
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Enable Master List Library
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Indicates whether to enable the Master List Library file so that all of supplied lists are available for selection. For more information, see List Library Files. When this checkbox is selected (default), the Master List Library file is enabled.
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I have FRACAS Maintenance Log data
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Indicates whether to turn on the FRACAS Maintenance Log table in the System file. Maintenance logs are required only to compute MTTR (mean time to repair) values. This property is shown only when the Project includes the FRACAS module. When the checkbox is cleared (default), this table is not shown.
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I have FRACAS Operating Time data
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Indicates whether to turn on the FRACAS Operating Times table in the System file. Operating time records are required only if MTBF (mean time between failures) values are to be calculated. This property is shown only when the Project includes the FRACAS module. When the checkbox is cleared (default), this table is not shown.
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I have Problem data
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Indicates whether to turn on the Problems table in the System file. This checkbox, shown only when modules that support problems are licensed, is cleared by default. A problem provides a way of grouping certain types of module records together to form a parent/child relationship.
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I want to analyze more than one Configuration
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Indicates whether to turn on the Configurations table and related options in the System file so that multiple system tree configurations can be analyzed. When this checkbox is cleared (default), they are not shown because only one configuration exists. When it is selected (default), they are shown because multiple configurations can exist.
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FTA Calculation Type
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The default method for calculating fault trees for System files newly inserted in the Project. This property is shown only when the Project includes the FTA module. The selection you make here is also shown for FTA Project Properties. Choices are:
> in the Project properties. For more information, see • Time Dependent — When selected (default), standard time dependent analysis is used to determine availability or reliability.
• Lambda Tau — When selected, Lambda Tau analysis is used to determine availability or short-term reliability when component or system age is unknown or indeterminate.
• SAE ARP4754A and ARP4761 — When selected, the guidelines and methods in these SAE documents are used to assess the safety of civil airborne systems and equipment.
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