Lesson 73 of 78 · Define the System
Capstone Brief & Current-State Evidence
Choose a capstone that is small enough to prove completely and rich enough to integrate disciplines. Good examples include an instrumented clamp-and-inspect station, a variable-part pick fixture, a safe pallet-transfer concept, a low-energy sorting cell, or a simulated robot-assisted packaging process.
Do not build hazardous industrial machinery as an unsupervised home project. A simulation, digital prototype, cardboard/full-scale ergonomic mockup, or low-voltage low-energy demonstrator can prove engineering reasoning without exposing anyone to uncontrolled energy.
Write the brief
Include:
- current task and users;
- problem evidence and why it matters;
- system boundary and exclusions;
- product/process family and representative variation;
- stakeholders and decision authority;
- baseline time distribution, quality, WIP, exposure, workload, recovery, cost, energy, and space;
- constraints, assumptions, and unknowns;
- intended project artifacts and review gates.
MIT’s design courses treat notebooks, analysis, fabrication, experiments, and review as one learning system 1. Your notebook is the trace of decisions: dated observations, alternatives, rejected ideas, calculations, tests, and changes.
Name the problem without embedding a purchase
Weak: “Install a collaborative robot.” Strong: “Reduce manual lifting above 12 kg and stabilize output at 30 good assemblies/hour across the defined family while preserving two-person changeover and safe recovery.”
Current-state evidence package
Create process map, spaghetti/motion view, task decomposition, time observations, defect and recovery log, hazard screen, photographs or diagrams of layout, information flow, and worker interviews. Protect privacy and obtain appropriate permission for real workplace data.
Gate 1
Pass when the need is evidenced, scope is bounded, representative cases exist, affected people are identified, and at least three non-automation improvements were considered. Stop if the problem disappears after simple process improvement.
Source trail
References
- 1Design and Manufacturing I. MIT OpenCourseWare. verifiedProject-centered course on electromechanical design, machine elements, experiments, drawings, modeling, fabrication, and technical review. Cited at: course outcomes.
Further reading
- Design of Electromechanical Robotic Systems. MIT OpenCourseWare. verifiedOpen textbook, assignments, laboratories, and projects for system design under measurement, environmental, and modeling uncertainty.
- The Work of the Future - Building Better Jobs in an Age of Intelligent Machines. MIT Task Force on the Work of the Future. 2020. verifiedTask-level account of automation, new work creation, skills, technology diffusion, job quality, institutions, and shared prosperity.
Check your understanding
- What makes a strong capstone scope?
- One bounded process with measurable need representative variation and feasible evidence
- Automate an entire factory
- Buy a robot first
- Avoid stakeholders
A bounded system lets you demonstrate depth across mechanics, controls, safety, economics, and deployment.
- Why baseline the current process?
- Without it improvement and tradeoffs cannot be measured honestly
- Baselines select motors
- Current work never matters
- It guarantees ROI
Baselines anchor requirements, economics, validation, and post-launch outcomes.