system dis-integration design PCs vs Macs conceptual, preliminary, detailed UX, user experience, usability DFM (Design for Manufacturing) standard components (near) net shape flexures vs fasteners vs adhesives self-aligning features minimize parts process selection documentation design files BOM production operation packaging PCB mounting wire routing mechanism alignment surface finish testing QA (Quality Assurance, defect prevention) QC (Quality Control, defect detection) burn-in cycling environmental fuzzing failure modes mechanical loads beyond the elastic limit cracking at stress concentration, fillets fasteners loosening, vibration, thread locks stripped threads misalignment, binding, flexures dynamic instability wiring ripping up PCB traces pulling wires out of connectors strain relief polarized connectors insulation abrasion, dielectric breakdown, shorts wire guides wire harnesses connector corrosion insulation abrasion components MOSFET over-voltage, current, temperature inductive flyback, reverse protection diodes regulator reverse polarity processor over-voltage, GPIO current source, sink current limiting transient protection EMI shielding power budget, supply compliance batteries, lifetime 48v supply to 24V input transient noise, processor faults wiring resistance, inductance bypass capacitors ground loops, mecca software memory leaks buffer overflow race conditions variable scope object interfaces dependencies obscurity scaling O(?) phase transitions in complexity manufacturing supply chains capacity collaboration data interchange fail fast feed-forward vs feedback development repair drop, shake modularity Widlarize lifecycle (right to) repair disassembly, reuse, recycling end of life assignment Design and document the system integration for your final project
