ITEM TOOLKIT

4 ITEM ToolKit Getting Started Guide
ITEM ToolKit Integrated Modules
• MIL-217
The MIL-217 module supports two methods of reliability prediction as described in MIL-HDBK-217F: Part Stress
Analysis and Parts Count. The Part Stress Analysis requires more detailed information and is usually applicable later in
the design phase. The Parts Count generally requires less information, typically part quantities, quality levels and the
application environment. It is most applicable early in the design phase and during proposal formulation.
MIL-217 calculates the failure rates and MTBF for electronic components, sub-systems, and systems. It can aid in locating
areas for potential reliability improvement.
• Telcordia (Bellcore)
The Telcordia module is based on the internationally recognized Telcordia Standard that calculates the reliability of
electronic equipment. The latest version of this document is the Reliability Prediction Procedure for Electronic Equipment,
SR-332.
Telcordia reliability prediction has only one focus: electronic equipment. It can provide predictions at the component level,
system level or project level for COTS (Commercial Off-The- Shelf Parts). Telcordia utilizes three methods for predicting
product reliability. These are:
Method I: Parts Count
Method II: Combines Method I predictions with laboratory data.
Method III: Predictions based on field data
• NSWC
The NSWC module uses a series of models for various categories of mechanical components to predict failure rates based
on temperature, stresses, flow rates and various other parameters. It provides models for various types of mechanical
devices including springs, bearings, seals, motors, brakes and clutches. NSWC is a relatively new standard, and is currently
the only one of its kind.
The NSWC Standard is a commonly used model for mechanical components. Standard procedures for predicting the
reliability of mechanical components, sub-systems and systems are defined in the Naval Surface Warfare Center Handbook
of Reliability Prediction Procedures for Mechanical Equipment, NSWC.
• IEC 62380 (RDF 2000)
The IEC 62380 module supports methods of reliability prediction as described in the French standard published by the
Union Technique de L’Electricite (UTE, July 2000). IEC 62380 is a universal model for reliability prediction of
electronics, printed circuit boards and equipment, which takes directly into account the influence of the environment.
Environment factors are no longer used as they are replaced by mission profile undergone by the equipment. The models in
the guide can handle permanent working, on/off cycling and dormant applications.
• CHINA 299B
The 299B module supports methods of reliability prediction as described in Chinese 299B standard. 299B is a reliability
prediction guide for electronic parts in both commercial and military industries. The standard provides the user with the
opportunity to take into account the environmental conditions, quality levels and stress conditions. The guide provides
procedures to perform Parts Stress Analysis as well as Parts Count Analysis.