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System Safety Engineering

System Safety Engineering entails the application of engineering and management principles, criteria, and techniques to optimize safety within the constraints of operational effectiveness, time, and cost throughout all phases of the system or facility life cycle.

APT engineers have established a dependable process to conduct System Safety Engineering. This process includes the following seven steps:

  • Identify hazards
  • Define the risks using hazard analysis techniques as early as possible in the system life cycle
  • Develop options to eliminate or control hazards
  • Provide for timely resolution of hazards
  • Define residual risks
  • Track hazards to closure
  • Obtain proper approval

Implementation of the seven-step process involves support activities which include:

  • Program tailoring
  • Defining safety criteria
  • Analyzing system hardware / software designs using fault tree analysis and other techniques
  • Issue resolution
  • Hazard tracking systems
  • Risk assessment
  • Environmental protection

Download the APT System Safety Brochure.


System Safety Scrapbook

System Safety ScrapbookIntended Audience: Engineers, designers, system safety analysts and reviewers of analyses.

The System Safety Scrapbook by Mr. Pat Clemens is available for purchase. This publication on the principles of the system safety practice is widely used both as a training aid and as a desktop reference. The Scrapbook is a compilation of 98, one-page, breezy style, problem-solving advisories on the practical aspects of the field -- such things as converting failure rate data to the probability of failure during a specified interval of exposure, and relating system safety practice to reliability engineering. Many watch-outs and potential analytical flaws are identified.

APT is offering this edition for $22 plus shipping.

System Safety Scrapbook: $22 + $11.75 S&H


Failure Probability Information Handbook
for System Components and Human Operators for use by Designers, Engineers and Analysts

Failure Probability Information HandbookIntended Audience: Designers, Reliability Engineers, and System Safety Analysts working with electrical, mechanical, hydraulic, pneumatic, and similar systems.

Purpose: This handbook contains a large database of failure probability data for system components and human operators of systems. Sources are identified for all data entries. Also included: guidance documents useful to engineers in arriving at, adjusting, and applying failure probability estimates. The database and guidance are assembled in this single source to support ease of reference use by designers, engineers, and analysts. Included are guidance papers on adjusting failure probability estimates for light duty (i.e., derated) cases, for high stress cases, use of Bayes theorem, and making failure estimates for systems and devices with failure-free operating records.

Failure Probability Information Handbook: $120 + $11.75 S&H


Point of Contact

Saralyn Dwyer or Jerry Rufe, 256.327.3373
aptinfo@apt-research.com