Where do I get the math behind the models used in ITK? (Q-8)
Click the Help menu, or the yellow ? to view the formulas used in the various modules/methods within ITK. Referring to the specific specification is also very helpful. A right-click on the Results Summary window, available via the Analysis menu on the top menu bar, will also show you the equations.
Some specifications are by subscription only, so you will need to purchase those from the provider. Other specs are available via the Internet.
ITEM follows the specs exactly, and has had all calculations confirmed by several outside entities. For convenience, ITEM has added an External part category, enabling engineers to add types of components to their systems that were not considered in the original spec. Additionally, an Adjustment Factor has also been added (default is 1) that can be used to adjust specific parameter values up or down for added flexibility.
Yes.
No, the C: installation files and the registry do not allow this combination.
Some libs are included with the license, others cost extra. The included ones are:
NonElec 95/NPRD 95
FMLib 97 - FMD 97
Parts Count
COMPLIB
Mil-M-38510
Contact ITEM directly to obtain the passwords to the .zip files.
Version 1.82 (or before) of QRAS does not include License Manager scheme or TCP/IP. File share is the only network method as of that release, up to version 1.8.9. Version 2.0+ supports TCP/IP licensing.
Network user opens a project with MIL and Fault Tree modules… Company owns one seat for each. Another user creating a project will only see modules in demo mode. When user #1 shuts down Toolkit, licenses are returned and available to User #2.
Installation – Toolkit installs Borland and Crystal Reports engines, so it may conflict with existing installs/old versions on client and server systems. Use the License Server concept if this is an issue.
No. You can model any part that is listed in any of the prediction modules and obtain MTBF results. Additionally, you can add an External part, of which you provide the parameter values to model it with. Libraries make the construction of your systems easier and more consistent.
An Event Tree for each Event Sequence Diagram (ESD) is built and quantified when an Analysis is run.
LHS is used in the Uncertainty analysis of Fault Tree and RBD events and blocks. On the System Dialog window, check the Uncertainty box, and enter the LHS Sample Size parameter. You can also specify a percentile from the confidence curve in addition to the standard 5% and 95% to appear on the Results view after analysis.
Only the Advanced Distributions, such as Function of Variables, Logistic Regression, etc. require Mathematica to be installed on the same PC as iQRAS. The most typically used distribution, Point Estimate and Uncertainty does NOT require Mathematica.