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COTS components

Testing for COTS components

  • Posted by doEEEt Media Group
  • On July 11, 2022
  • 0

According to European Cooperation for Space Standarization (ECSS), COTS components are commercial electronic parts readily available off-the-shelf, and not manufactured, inspected or tested in accordance with military or space standards

The drive to use COTS (Commercial Off-The-Shelf) components in the space industry is growing since these parts allow to obtain higher performance at the system level, which is difficult to obtain using currently available space components. However, the use of COTS components has an inherent risk because of the lack of confidence in the traceability and the long-term performance of these parts as well as the new concerns affecting mostly this type of products (RoHS, counterfeit parts, long-term reliability, etc.).

Consequently, COTS parts should be considered only if existing hi-rel alternatives are impractical from a performance point of view.

Advantages of using COTS in space application

A key factor for the safe use of COTS parts in space applications is to take into account the specific quality and reliability concerns associated with the use of these components in space applications, as well as to obtain technical knowledge and manufacturers’ support necessary to properly estimate the risk and the required countermeasures.

With a stringent methodology for product assessment, selection, procurement, and testing (screening and qualification), using COTS components can provide a solution when space-level parts are not feasible or available for the intended application.

Methodology for the selection and procurement

  • Risk assessment. Functionality, Support, Production.
  • Part selection. Obsolescence control, Know-how, Experience.
  • Reliability assurance. Characterization, Screening, Validation.

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Qualifying COTS at a reduced cost

When qualifying COTS components, we are fully characterizing the device under space environment working conditions. These COTS are not guaranteed for Space use by the Manufacturer. ALTER guarantees that the parts are tested strictly by agreed conditions. Then, strictly speaking, when a result deviates from the expected behavior (under normal environmental conditions) ALTER will raise an incidence report that will be treated together with you to assess the acceptability for your specific project. Although the test execution can be interrupted once the failures are found, providing some savings in the overall cost, consider that most of the Non-Recurrent Costs will be incurred before the test starts, so they will be invoiced. ATN will work with all participants in the project to define the next steps after failure, including assessment about other parts providing more confidence.

COTS components testing

ALTER offers a global solution to specific concerns about COTS space components, such as life cycle (obsolescence) or counterfeit detection, integrating all required steps into the supply and testing chain and providing alternative solutions and risk-mitigation strategies. The company has accumulated experience in validating any kind of EEE component, putting in place a stringent methodology for product assessment, selection, procurement, and testing (evaluation, screening, and qualification).

Based on the accumulated experience and in close cooperation with the customer, specific test flows can be defined for each individual type of component.

The risks associated with the use of COTS can be minimized using:

  • Appropriate product selection
  • Evaluating device construction
  • Radiation evaluation
  • Incoming inspections
  • Defining proper test flow
  • Performance of reliability tests

Reference documents: 

  • PEM-INST-001, Instructions for PEM Selection, Screening, and Qualification (NASA)
  • EEE-INST-002, Instructions for EEE Parts Selection, Screening, Qualification, and Derating (NASA)
  • ECSS-Q-ST-60-13, Commercial Electrica, Electronic and Electromechanical components (ESCC)
  • ATN-TN-001, Management of COTS for Space Applications (Alter Technology)

COTS COMPONENTS
Laboratory Standard Testing
ALTER puts a stringent methodology for product assessment, selection, procurement, and COTS components testing.

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doEEEt Media Group
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A team of experts that brings you the latest and most important news about the EEE Part and Space market.
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