Читать книгу Design for Excellence in Electronics Manufacturing - Cheryl Tulkoff - Страница 17

Elements of a comprehensive reliability program include:

 Organization: Develop a system that rewards teams for effective reliability engineering focus. Reliability must be the goal of the entire organization and must be implemented early in the process apart from verification and validation (V and V).

 Reliability goals: Consider an availability goal as well.

 Reliability resources: Resources need to be assigned to reliability characterization and committed in program staffing. Characterization infrastructure needs building.

 Software reliability: Frequently overlooked but critical to today's products and systems

 Defined use environments: Engage field service to obtain knowledge of relevant stresses (loads, contaminants, electrostatic discharge [ESD], etc.) in use environment, and then exercise these during reliability characterization.

 Thermal analyses.

 Circuit and component stress analyses.

 Derating: Employ systematic derating by computational and/or experimental analysis.

 Critical components identification: Identify and prioritize components and subassemblies for extended reliability analysis and test activity during early development. Use supplier life data where possible; create the expectation of minimum supplier reliability competency.

 Failure mode and effects analysis (FMEA).

 Critical to quality (CTQs) and tolerance identification.

 Comprehensive control plans with suppliers.

 Design for excellence practices.– Design for Manufacturability (DfM), Design for Testing (DfT), Design for Reliability (DfR), Design for Excellence (DfE), and Design for Sustainability (DfS).– Manufacturing involvement in DfM and DfT.

 Step‐stress tests to define design margins (HALT).

 Simulation for end‐of‐life prediction

 Relevant product qualification tests

 Accelerated life test (ALT) to validate the life‐prediction model

 RCA on failures and field returns with a feedback loop (design, measure, analyze, improve, control [DMAIC])

These elements will be explored in more detail in the upcoming sections and chapters.