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Is there a quick way to edit the properties defined in Blocks, Policy
Resources and Templates in a BlockSim project?
In BlockSim,
the Item Properties Table allows you to view and/or edit the properties of the blocks in the
Diagram Sheet(s), Fault Tree Sheet(s), Template(s), Maintenance Template Sheet(s) and
Policies within the current project. This provides you with another way of viewing and
editing properties without having to open a separate window for each item. Any changes
made to properties via the Item Properties Table will be applied to the corresponding
properties window and any changes made via a properties window will be reflected in the
Item Properties Table.
To open the Item Properties table, choose Project > Item Properties Table.
You can specify which columns will appear in the Item Properties Table worksheet from the
Select Visible Columns window (Edit > Select Visible Columns). For example, the Select
Visible Columns window for Templates looks like this:
What is the difference between cumulative and non-cumulative data input in
RGA 7?
In RGA 7, when entering data in a Data
Sheet and using the default application settings, the data set is assumed to be
composed of cumulative data, which means that each row shows the total amount of
test time up to that point. For example, if the failure times are entered as 10,
20, 30, 40 and 50, this indicates that the first failure occurred at 10 hours of
test time, the second failure occurred 10 hours later at 20 hours of test time, the
third failure occurred 10 hours later at 30 hours of test time, and so on.
However, you also can enter non-cumulative data, which means that each row shows
the incremental test time since the last observation. In this case, if the failure
times are entered as 10, 20, 30, 40 and 50, this indicates that the first failure
occurred at 10 hours of test time, the second failure occurred 20 hours later
at 30 hours of test time, the third failure occurred 30 hours later at 60 hours
of test time, and so on. In other words, for cumulative data, you enter the
time of each failure while for non-cumulative data; you enter the
times between failures.
Of course, this affects how the total test time is calculated. For
example, if you have a data set that contains the failure times of 10, 20, 30
and 50, if you are using cumulative data entry, the total test time would
be 50 because the test time accumulates with each failure time and 50 is the
last data entry point. Compare that to using non-cumulative data entry. In
this case, the total test time would be 110 (the sum of the times), because
the test time starts over at 0 for each failure time.
By default, RGA 7 uses cumulative data entry, but you can
change that on the Calculations page of the User Setup (File > User Setup).
Note that you can easily override the default setting for any Data Sheet in either
of two ways using the Data Sheet’s control panel:
- In the Settings Area of the Main page, you can click the
Cumulative/Non-Cum option to switch between the settings.
- On the Analysis page, you can select or clear the Input is Cumulative
check box.
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