Objective: Following the product development process, develop customer needs and engineering specifications, evaluate concepts, resolve major technical hurdles, and employ rigorous engineering principles to design an alpha prototype. Develop a design verification plan and fully document design.
- Phase 0 Planning: Team norms and values; SDI project plan / schedule including specific deliverables and due dates. (wks 1-3)
Phase 1 Concept Development: Detailed,
quantitative target specifications mapped to customer
needs. (wks 1-3)
- EE / CE: Power, voltages, current, cost, size, environmental conditions, noise, detailed performance specifications. All functionality should be defined with quantitative specifications.
- ME: Horsepower, torque, rpm, mass flow rate, temperature, heat flux, lift, drag, cost, size, weight, factor of safety, number of cycles, expected life.
- ISE: Throughput, Weeks of Supply, Lead Time, Capacity, Cycle Time, Throughput, Work-in-Process, Service Levels, Footprint, Cost, Safety, Defect Rates, MTBF, MTTS, Scarp rate, Machine/Operator Utilization
Phase 1 Concept development: Develop
multiple concepts (on paper) and select most feasible.
Update specifications. Customer Feedback. (wks 3-4)
- EE / CE: High level block diagrams, rough schematics, power budget, space budget, critical component requirements.
- ME: Basic functionality, estimates of size/capacity of major components, connections/links between components considered, basic parts list, cost estimates.
- ISE: Factory Layout, Process Flow Diagrams, Work Flow Maps, Supply Chain Maps, Quality Control Plan, Supply Chain Management & Ordering Policies, Inventory Holding Locations, Ergonomic Design, Serviceability & Maintainability Design, DFX
Phase 2 System-Level Design: System
design including architecture, sub-system definition,
interface definition, and more detailed specifications.
Appropriate engineering analysis including hand
calculations and simulation / modeling. Determine
greatest challenges / risks to project.
Concept/System Design Review (partial). (wk
- EE / CE: More detailed block diagrams, schematics, SPICE simulations, matlab modeling, memory requirements, processor speed calculations.
- ME: Analysis of components, stress/deflection determination for major components, fatigue analysis, heat flow calculations, control system laid out.
- ISE: Linear Programming, Queuing Theory, Discrete Event Simulation, Lean Analysis, SPC, Inventory Analysis, Physical Workload Assessment
Phase 2 System-Level Design: Proof of
concept breadboard, brassboard, or simulation of high
risk technologies defined in 4. Use appropriate
discipline specific methods to demonstrate confidence
in selected architecture / design approach. Risk
assessment for technology / cost / schedule.
Concept/System Design Review (completed). (wks
- EE / CE: Physical hardware of key / high risk sub-systems, development board evaluation of DSP algorithms, etc.
- ME: Finite element analysis of key / high risk components, simulation of control systems.
- ISE: Mostly simulation-based or mock-up models
Phase 3 Detail Design: Detailed design
to meet all customer needs. All long lead items should
be identified for ordering. Detail Design
Review. (wks 8-9).
- EE / CE: Final ORCAD schematics, BOM, detailed SPICE, Matlab, etc. simulations.
- ME: 3D CAD drawings, mechanical simulations, detailed BOM.
- ISE: Finalize the items in 3) with supporting analysis in 4) & 5) coupled with implementation plans, particularly project schedules and risk assessments
- Phase 3 Detail Design: Project Review (wk 10).
Phase 3 Detail Design: Develop
detailed test plan with linkage to engineering
specifications and customer needs. The results of this
plan should demonstrate the design meets all customer
needs and translated engineering specifications (both
high level specifications and cascaded sub-system
specifications). (wks 10-11)
- EE / CE: Step by step plan to fully characterize developed electronic system against all specifications and customer needs.
- ME: Step by step plan to fully characterize developed mechanical system against all specifications and customer needs.
- ISE: Step by step plan to fully characterize developed implemented system against all specifications and input requirements.
- Phase 3 Detail Design: Design Documentation: update Design History File on EDGE (all design documents, final drawings, design review materials); BOM sufficiently detailed to define source, cost, and lead time; Test Plan; Project Plan for SDII. (wk 11).
See the MSD I deliverables timeline for an overview of week-by-week deliverables.