dfm-review

# DFM Review Skill ## Purpose The DFM Review skill provides capabilities for systematic design for manufacturing review and optimization, enabling cost-effective and producible mechanical designs. ## Capabilities - Manufacturability assessment - Process selection guidance - Tooling feasibility analysis - Cost driver identification - Design modification recommendations - Tolerance and surface finish review - Material availability assessment - Supplier capability consideration ## Usage Guidelines ### DFM Principles #### Core DFM Guidelines ``` 1. Minimize part count 2. Use standard components 3. Design for ease of fabrication 4. Design for ease of assembly 5. Design for ease of service 6. Consider process capabilities 7. Minimize secondary operations ``` #### Process-Specific Guidelines | Process | Key DFM Considerations | |---------|----------------------| | Machining | Access, fixturing, tool reach | | Casting | Draft, wall thickness, gates/risers | | Injection molding | Draft, undercuts, sink marks | | Sheet metal | Bend radius, hole-to-edge, grain | | Welding | Access, joint design, distortion | | Assembly | Part orientation, fastener access | ### Machining DFM #### Feature Guidelines ``` Holes: - Standard drill sizes preferred - L/D ratio < 5 for drills - Flat bottoms require end mill - Provide drill point clearance Pockets: - Corner radius = tool radius - Max depth < 4x tool diameter - Provide tool access Threads: - Standard thread sizes - Depth 1.5-2x diam...