Complex modern electronic and electro-mechanical systems have a huge number of critical failure modes, all of which must be addressed ideally at the design and concept stage, with the objective being to achieve a high level of Operational Availability . Usually these issues have to be addressed with finite resources. It is essential to carry out a formal reliability modeling exercise at the concept and development stages of any complex system. At the stage of development, reliability engineers must inevitably rely on estimated failure rates and logistics delays based on assumptions of the proposed repair and support organization, in order to try to define the number and type of spare parts to be held forward. All of this has an impact on funding for the project taking into account such factors as redundancy, the initial spares buy and repair manpower requirements. To achieve a high state of readiness or system availability requires that every element has been considered and estimated and that things like the initial spares provisioning, the repair organization, manpower levels and levels of training and test equipment are all adequate for the task. Even with all of the combined resources of design and reliability engineers, logistic planning staff and human resources specialists brought to bear on the task of estimating the need for support equipment, maintenance schedules, repair process definitions and required manpower levels, we are still left with the task of assessing every possible reason for system downtime. Only when these problems are addressed can we begin to put the essential elements in place to ensure that we have an adequate level of Operational Availability Hilaire Ananda Perera has 40 Years of North American experience in Reliability/Maintainability/Safety Engineering https: //www.linkedin.com/in/hilaireperera/ - 2007 - Present: Reliability/Maintainability/Safety Consulting Engineer at Long Term Quality Assurance (LTQA), Markham, Ontario - 1983 - 2007: Reliability/Maintainability/Safety Engineer at Honeywell Aerospace, Mississauga, Ontario - 1981 - 1983: Reliability/Maintainability Engineer, Philips Electronics Ltd., Telecommunications Division, Scarborough, Ontario - 1977 - 1980: Design/Reliability Engineer, DAF Indal Ltd., Mississauga, Ontario - 1973 - 1976: Design Engineer, Stackpole Machinary Co., Scarborough, Ontario ## Bachelor of Science Production Engineering (1972), University of Aston, Birmingham, England ## Professional Engineer (P.Eng) 1976 to Present - Association of Professional Engineers of Ontario ## Certified (1983 - 2007) Reliability Engineer - American Society for Quality ## Honeywell Six Sigma Plus Green Belt Certified (2001) ## Honeywell Design For Six Sigma Certified (2003) ## Allied-Signal Aerospace 1997 Growth Award Emphasized the fact that reliability is the time-based concept of quality and reliability design is an iterative process that begins with specification of reliability goals consistent with cost and performance objectives. SPECIALTIES: ** Use probabilistic design methods (Stress/Strength, Cumulative Damage) ** Parameter Mean & Variation calculation using Tolerance Statements ** Software (MathCad, SigmaPlot, FaultrEASE, Weibull) use for analysis ** Implemented Adaptive ESS to assure a very small Outgoing Defect Density ** Promoted RAC PRISM that use stress data and Process Grade Factors as a better than MIL-HDBK-217 ** Developed a model using Weibull Parameters to.calculate.Optimum.ESS.Thermal.Cycling.Time.with.Cost PUBLISHED PAPERS and BOOKS: ** Outgoing Reliability Assurance Using Chance Defective Exponential Model, AMMJ Mar 2015 ** An Introduction of Statistical Confidence Levels, AMMJ Sep 2014 ** Product Assurance Capability Quantified, Reliability Analysis Center (2Q2004) ** Adaptive ESS, Allied Signal Aerospace Company Technical Exchange Conference 25-26SEP1991 ** Optimum Cost Maintenance, Machine Design 20Jun1985 ** Reliability of Mechanical Parts, Machine Design 10Sep1987 ** Product Assurance ISBN 9781544843889 ** Adaptive Environmental Stress Screening Handbook ISBN 9781976014161