A unique failure rate and failure mode data bank, based on over 500 published data sources together with Technis's own collection of reliability data. Over 50 versions since 1987.

FARADIP is widely used as a data reference. It provides failure rate DATA RANGES for a nested hierarchy of items covering electrical, electronic, mechanical, pneumatic, instrumentation and protective devices. Failure mode percentages are included, together with an FMEDA package which calculates Safe Failure Fraction (per IEC 61508).


A low cost fault tree package which offers the majority of functions and array sizes normally required in reliability analysis. TTREE is user friendly and, unlike more complicated products, can be assimilated in less than an hour. A comprehensive range of importance measures are provided, to identify the ranking of critical failures. There are user friendly inputs and graphical outputs for use in word processing packages.


David has developed and calibrated a new generation partial BETA model for assessing common cause failure. Unlike previous models, it takes account of proof-test intervals and involves positive scoring of CCF related features rather than a subjective "range score". It has been calibrated against 25 field data results and has the facility for further development and calibration by the user. It addresses M out of N redundancy. It is suitable for IEC 61508 analyses.


A Quantified Reliability Centred Maintenance Package with graphical outputs for use in word processing. It provides:


A program providing layers of protection analysis PLUS quantified risk modeling in order to assess whether risks are ALARP. Establishing SILs. An interactive package enabling users to input risk factors, demand rates and the reliability of mitigation levels, to determine if risk targets are met. LOPA-PLUS ensures a fully quantified approach to risk targeting and provides a professional alternative to rule-based, prescriptive techniques.


The Zonecheck program is now withdrawn. It was originally written for IGEM in anticipation of draft guidance which did not eventually incorporate the methodology used in "Zonecheck" . It cannot, in any way, be used as a justification for not carrying out a full zoning study.