John Evans

John Evans

R&M Program Manager

Learn more about Reliability and Maintainability (R&M) Program Manager John Evans.

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R&M Technical Fellow

Points of Contact

Points of Contact

For details on contacting a R&M Point of Contact (PoC) for your location, click below.

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Objectives Hierarchy

The Office of Safety and Mission Assurance (OSMA) has introduced a new objectives-based approach to better support NASA’s increasingly complex missions in a changing design environment. By focusing on objectives, OSMA hopes that the new standards will be more flexible, agile and cost-effective, and will allow more ingenuity to achieve objectives. It will serve as a guide to help programs and projects plan how they will meet their objectives, instead of dictating what they must do to via prescriptive requirements. Read the article, "OSMA Introduces New Objectives-Based Strategies," to learn more about objective hierarchies.

View Hierarchy


Launch SATERN 

SATERN Courses

Course Title Course Number Buttons
Applications of Experiment Design and Analysis in Reliability Engineering SMA-RM-EXTI-461 SMA-RM-EXTI-461 Details
Data Collection and Analysis I SMA-RM-WBT-321 SMA-RM-WBT-321 Details
Data Collection and Analysis II SMA-RM-WBT-421 SMA-RM-WBT-421 Details
Design for Maintainability SMA-RM-WBT-231 SMA-RM-WBT-231 Details
Design for Reliability SMA-RM-EXTW-221 SMA-RM-EXTW-221 Details
Human Reliability Analysis SMA-RM-WBT-481 SMA-RM-WBT-481 Details
Maintainability and Supportability Analysis and Integration SMA-RM-WBT-351 SMA-RM-WBT-351 Details
N: Basics of Reliability and Maintainability SMA-RM-WBT-100 SMA-RM-WBT-100 Details
Parts and Materials Assessment (EEE, Mechanical, Parts Stress/Derating) SMA-RM-WBT-411 SMA-RM-WBT-411 Details
Physics of Failure SMA-RM-WBT-451 SMA-RM-WBT-451 Details
R&M Principles and Planning SMA-RM-EXTW-211 SMA-RM-EXTW-211 Details
R&M Testing and Demonstration I SMA-RM-WBT-341 SMA-RM-WBT-341 Details
R&M Testing and Demonstration II SMA-RM-WBT-441 SMA-RM-WBT-441 Details
Reliability Growth SMA-RM-EXTI-471 SMA-RM-EXTI-471 Details
Reliability, Availability and Maintainability Modeling I SMA-RM-WBT-331 SMA-RM-WBT-331 Details
Reliability, Availability and Maintainability Modeling II SMA-RM-WBT-431 SMA-RM-WBT-431 Details
Reliability, Availability, and Maintainability (RAM) Planning for Programs and Projects SMA-RM-WBT-241 SMA-RM-WBT-241 Details

Policy and Guidance


NPD 8720.1 NASA Reliability and Maintainability (R&M) Program Policy

This policy states the R&M requirements all programs and projects must meet during all phases of development and operations.

See NPD 8720.1
NASA-STD-8729.1 Planning, Developing and Managing an Effective Reliability and Maintainability (R&M) Program

This standard provides R&M guidance to customers (or purchasers) and suppliers (or contractors) on R&M requirements development, design implementation and evaluation.

See NASA-STD-8729.1

Model-Based Mission Assurance

Model-Based Systems Engineering (MBSE) is seeing increased application in the planning and design of NASA’s missions. The Office of Safety and Mission Assurance is calling the corresponding approach to mission assurance Model-Based Mission Assurance (MBMA). In MBSE, a virtual model of the system is created, typically while it is still in the design or planning phase. The model is used as a singular reference source — a single point of truth — for system concept, requirements and design, and verification and validation and associated data. Safety and Mission Assurance (SMA) can leverage that model to perform a variety of assurance analyses earlier in the life cycle reducing the occurrence of costly changes after the system design has become more hardened. By using the MBSE model, SMA personnel will be able to run simulations and tests in real time, instead of having to wade through — in some cases — thousands of pages of documentation. In addition to being more timely, MBMA promises to be more flexible, faster and more cost-effective.

Learn More About MBMA Learn More About MBSE

Probabilistic and Statistical Analysis

Probabilistic and Statistical Analyses are used to determine the risk and risk contribution of a wide variety of applications, such as the International Space Station, new launch vehicles and risk at NASA centers. They evaluate technical risk that impact NASA’s objectives and programs to identify acceptability of ventures, activities, new launches and operations.

Physics of Failure

Physics of failure is an engineering-based approach to reliability that uses modeling and simulation to eliminate failures early in the design by addressing root-cause failure mechanisms. The physics-of-failure approach proactively incorporates reliability into the design process by establishing a scientific basis for evaluating new materials, structures and electronics technologies. Physics of failure encourages innovative, cost-effective design through the use of realistic reliability assessment.


Title Publication Author  
Research Challenges in Modeling and Simulation for Engineering Complex Systems National Training and Simulation Association National Training and Simulation Association See Paper
Model Based Mission Assurance in a Model Based Systems Engineering (MBSE) Framwork NASA Steven L. Cornford and Martin S. Feather See Paper