RAM COMMANDER DOWNLOAD 7.5 Demo

RAM Commander is a Reliability and Maintainability software for reliability professionals and design engineers. This powerful software program covers the entire scope of engineering tasks related to reliability of electronic, electro-mechanical, and mechanical systems.

RAM Commander is modular software allowing a customer the flexibility of gradual addition of the modules to the package in accordance with the requirements of a project or the budget constraints.	Prediction Methods MIL-HDBK-217 TR332 - Bellcore Issue 6 SR332 - Telcordia 2001 RDF 95 - French Telecom UTEC 80810 (CNET 2000) HRD - British Telecom GJB299 - Chinese Standard IRPH93 - Italtel ALCATEL RADC 85-91 NPRD-95 NSWC-98/LE1 Mechanics Siemens SN 29500-1 FIDES IEC 62380
Reliability Prediction               RAM Commander provides everything necessary for primary reliability prediction based on one of the prediction models for electronic equipment, mechanical and electro-mechanical equipment. Graphical presentation of the projects Product Tree allows visibility and easy data manipulation.

Product Tree Table.

Performing reliability allocation, Pareto analysis, RAM sensitivity analysis producing temperature curves and mission profile are extremely easy with RAM Commander.

Pareto Report. Pareto analysis identifies components or component families that contribute most significantly to system or assembly failure rate - about 80% of total failure rate

Temperature Curve Report. Presents the failure rate or MTBF as a unction of temperature: regular, multi-environment & multi-items on one graph.

Field Failure Rate Module

Reliability Block Diagram (RBD)                                                     

RBD module allows performing the functional Reliability and Availability analysis of systems with variety of reliability distributions, and types of redundancy and repair factors. While the basic RAM Commander module provides the reliability calculations and predictions for non-redundant systems, RBD utilizes data defined in the basic module, and performs either analytical calculation or Monte Carlo simulation depending on the type of a reliability configuration of the system.

The analytical technique is used mostly for exponential distributions. For each RBD, a graph of the reliability function R(t) can be drawn and MTBCF (Mean Time Between Critical Failures) can be calculated using numeric integration.

Reliability Block Diagram and MTBCF graph

System Configuration feature of the RBD module is an ingenious answer to the requests of our customers who need to compare the reliability and availability of various system configurations created as the sub-sets of the project product tree. The creation of the unlimited number of system configurations, easy transformation of each configuration into an RBD, MTBCF calculation, synchronized with the product tree changes, and finally a clear and elegant graphical presentation - all this makes the System Configuration feature an invaluable addition to the RAM Commander performance.

System Configuration Table.

Maintainability                                                                                                    Maintainability Prediction in RAM Commander is based on the MIL-HDBK-472, Procedure V, Method A. Maintainability module is used to predict maintainability of systems and equipment of any type, including avionics, ground and shipboard electronics, mechanical equipment, etc., at all levels of maintenance.

Maintenance Engineering Analysis report

Spare Parts analysis and optimization:                                                                  RAM Commander Spare Parts Analysis and Optimization is based on two cost optimization criteria: Total No Shortage Probability & Availability. The module performs Cost-Availability optimization of repairable and discardable parts for all levels of repair. Spare Parts Analysis and Optimization module takes into account the variety of mission applications, e.g., when the primary restriction is weight or volume, such as for fly-away kits or when no repair or supply of spare parts is permitted (unsupported mission). Data entry for the module is minimized due to the usage of the data used in the RAM project.

Spare Parts Optimization

Derating                                                                                               The Derating module is used to analyze the overstress of components under current temperature conditions. The module provides a tool to define Derating curves and identify overstressed components, i.e., those working under stress exceeding the specified rating value. Rating, or maximum rated stress, is the specified value of temperature, power, voltage or current that define the absolute maximum stress limits. Exceeding these values creates a high probability of part damage/failure.

module includes all components in the selected part of the system, or only the overstressed ones. Derating reports with indication of overstressed parts.

Libraries and Data Import
RAM Commander enables the user to access and use various sources of reliability information: extensive RAM Commander or user-defined component libraries, field data or data imported with the help of Import Wizard.

FMECA                                                                               

Failure Mode, Effects and Criticality Analysis (FMECA) is a natural continuation, and in many cases inseparable part of the Reliability Analysis. Previously a separate software package, FMECA is now a fully-integrated RAM Commander module. FMECA module uses a product tree previously created by the user for the reliability analysis purposes.

Testability Analysis       Testability Analysis sub-module of the FMECA module is intended for in-depth Testability analysis. The main characteristics of Testability - BIT/Detection Coverage and Fault Isolation Resolution - can be calculated for each maintenance level (Organizational, Intermediate, Depot) and for specific detection methods (BIT, BITE, external test equipment, etc.). Test method efficiency and indication are defined for each test method or a group of test methods.

FMECA Standard Reports FMEA - MIL-STD-1629 FMECA Criticality Analysis - MIL-STD-1629 End Effects Criticality Numbers Criticality Matrix Fault Tree NHE Critcality Test methods BIT/Detection Coverage Fault Isolation Resolution

Testability analysis is widely used for the development of necessary supporting documentation: maintenance manuals, troubleshooting procedures and inspection requirements.

Test coverage report shows the percentage of failures covered by a chosen test.

Process & Design FMEA                                                                                  

Formerly a separate package, Process and Design FMEA is now fully integrated in RAM Commander. This module performs Process/Design potential Failure Mode and Effects Analysis. The uniqueness of the RAM Commander approach to process/design FMEA is reflected in the graphical presentation of the process flow:

Main window of the RAM Commander Process & Design FMEA

Decompose the system or process into components or sub-processes. For each functional block, define name & function, enter failure mode causes and effects manually or from the libraries. Process & Design FMEA module provides full graphical and textual visibility of the Potential Failure Mode => Cause => Effects chain.

Edit cause dialog contains corrective actions and RPN (risk priority number

Process and Design FMEA produce all the reports required by PFMEA: design FMEA, Process FMEA, Pareto analysis, regular FMEA with all NHE, basic fault tree

Fault Tree Analysis (FTA)                                                                                  
 

****See also LOGAN Fault & Event Tree Analysis  for an alternative
FT & ET Analysis Tool*****

RAM Commander's FTA module is the one of the unique features of the RAM Commander. It is simplified FT Analyzer, fully integrated with RAM Commander product tree and FMECA. It implements and summarizes the first-hand experience gained by the A.L.D. FTA experts in hundreds of projects using RAM Commander and other FTA software.

Main window of the RAM Commander Fault Tree Analysis Module

 

Fault Trees are one of the most widely used methods in system reliability and failure probability analysis. A fault tree is a graphical representation of a logical structure representing undesired events ("failures") and their causes. You create the logical structure by using gates and represent undesired events by using basic events. Reliability parameters are assigned to the basic events. Widely used in system reliability studies, fault tree analysis offers the ability to focus on an event of importance, such as a highly critical safety issue, and work to minimize its occurrence or consequence. The probability of the top-level event can then be determined by using mathematical techniques. The resulting fault tree diagram is a graphical representation of the chain of events in your system or process, built using events and logical gate configurations.