DMD Cheat Sheet 2026

The 30 highest-yield DMD facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which modeling technique is most suitable for creating complex, aerodynamic surfaces in automotive or aerospace design? → NURBS surface modeling
2. What is the primary purpose of a digital manufacturing system? → Streamline and automate manufacturing operations.
3. In assembly modeling, what is a 'mate' or 'assembly constraint' used for? → Establishing geometric relationships that control component position
4. Which DMAIC phase involves collecting baseline data to understand current process performance? → Measure
5. What is the purpose of a 'tolerance stack-up analysis' in assembly design? → Determining whether accumulated dimensional variations will allow proper assembly function
6. Which simulation approach uses random sampling to statistically assess how design variations affect product performance? → Monte Carlo simulation
7. Which process converts digital designs into physical products? → Digital-to-physical manufacturing processes.
8. What is the function of an end effector in a robotic system? → It performs specific tasks like gripping or welding.
9. Which technology allows for simulation of manufacturing processes before production? → Digital Twin technology.
10. Which programming method allows operators to teach robots by physically guiding them through a task? → Lead-through teaching
11. Which tool is used to identify the root cause of a manufacturing defect through a visual diagram of cause categories? → Ishikawa (fishbone) diagram
12. Which communication protocol is most commonly used for machine-to-machine data exchange in smart factories? → OPC-UA (Open Platform Communications Unified Architecture)
13. What is a collaborative robot (cobot)? → A robot designed to work safely with humans
14. What is the main function of Product Data Management (PDM) software in a CAD environment? → Managing CAD file versions, access control, and revision history
15. What does 'First Pass Yield' (FPY) measure in manufacturing quality? → The percentage of units that complete a process correctly without rework or repair
16. What is the primary purpose of heat treatment in materials processing? → To change the material's properties through heating and cooling.
17. In parametric CAD modeling, what happens when a base dimension is changed? → All dependent features automatically update to reflect the change
18. What is the main advantage of using industrial robots in manufacturing? → They improve precision, speed, and consistency.
19. Which process is used to permanently join two or more materials by melting them together? → Welding
20. What is the primary purpose of Finite Element Analysis (FEA) in product development? → Predicting structural behavior under applied loads and conditions
21. What is 'Design for Manufacturability' (DFM) analysis in the CAD design process? → Reviewing a design early to identify features that are difficult or costly to manufacture
22. Which approach uses AI to automatically adjust machine parameters during production to optimize output quality? → Closed-loop adaptive control
23. Which type of automation system is most suitable for producing a large volume of identical products? → Fixed automation
24. What does PLC stand for in industrial automation? → Programmable Logic Controller
25. What does SPC stand for in digital manufacturing quality control? → Statistical Process Control
26. What is a Manufacturing Execution System (MES) and what does it do? → Software that tracks and controls work-in-process on the factory floor in real time
27. Which of the following tools is commonly used for managing product development projects? → Project management software
28. What is a key benefit of using simulation tools in product design? → They predict product performance in virtual environments.
29. Which quality cost category includes scrap, rework, and warranty claims? → Failure costs
30. In digital manufacturing, what is the role of an Automated Optical Inspection (AOI) system? → To detect surface defects and dimensional errors using cameras and image processing