A unique failure rate and failure mode data bank, based on over 40 published data sources together with Technis's own collection of reliability data. 29 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 FMEA package which calculates Safe Failure Fraction (per IEC 61508).



Fully quantified risk modelling in order to assess whether risks are ALARP. Establishing safety integrity levels (SILs). An interactive package which enables users to input risk factors, demand rates, and the reliability of mitigation levels, in order 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.


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 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 was calibrated against 25 field data results and it is suitable for IEC 61508 analyses.


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


A program which estimates the probability of a natural gas/air mixture in a poorly ventilated enclosure. Indicates if there is a need for a more stringent IGEM/SR/25 assessment.