Voice of Customer, Requirements Analysis, House of Quality Consulting


RAM Requirements

The first step in the reliability engineering process is to specify the required reliability that the system must be designed to achieve.

To be meaningful, a reliability requirement must be specified quantitatively. It may be specified in either of two ways; as a nominal value or a minimum acceptable value.

RAM Requirement Features

  • A quantitative statement of the reliability specification.
  • A full description of the environment in which the system will be stored, transported, operated, and maintained.
  • Clear identification of the time measure and mission profile.
  • A clear definition of what constitutes a failure.
  • A description of the test procedure with accept/reject criteria that will be used to demonstrate the required reliability.

RAM Requirement Uses

  • Establish goals for developmental reliability testing.
  • Establish criteria to validate and verify the design.