The [[TRIZ]] 39 engineering parameters are used to describe the characteristics of a system that can be improved or that might cause contradictions when changes are made. These parameters are part of the [[TRIZ contradiction matrix]], which helps identify inventive principles to resolve conflicts between parameters. Here are the 39 engineering parameters: 1. **Weight of Moving Object**: The mass of an object that is in motion. 2. **Weight of Stationary Object**: The mass of an object that is not in motion. 3. **Length of Moving Object**: The dimension of a moving object in the direction of motion. 4. **Length of Stationary Object**: The dimension of a stationary object. 5. **Area of Moving Object**: The surface area of a moving object. 6. **Area of Stationary Object**: The surface area of a stationary object. 7. **Volume of Moving Object**: The three-dimensional space occupied by a moving object. 8. **Volume of Stationary Object**: The three-dimensional space occupied by a stationary object. 9. **Speed**: The rate at which an object moves. 10. **Force**: The interaction that causes an object to change its motion. 11. **Stress or Pressure**: The force applied per unit area. 12. **Shape**: The external form or appearance of an object. 13. **Stability of the Object**: The ability of an object to maintain its state of equilibrium. 14. **Strength**: The ability of an object to withstand an applied force without failure. 15. **Durability of Moving Object**: The ability of a moving object to withstand wear, pressure, or damage. 16. **Durability of Stationary Object**: The ability of a stationary object to withstand wear, pressure, or damage. 17. **Temperature**: The degree of heat present in a substance or object. 18. **Brightness**: The intensity of light emitted or reflected by an object. 19. **Energy Spent by Moving Object**: The amount of energy consumed by a moving object. 20. **Energy Spent by Stationary Object**: The amount of energy consumed by a stationary object. 21. **Power**: The rate at which work is done or energy is transferred. 22. **Loss of Energy**: The amount of energy that is wasted or not used effectively. 23. **Loss of Substance**: The amount of material that is wasted or lost. 24. **Loss of Information**: The amount of data that is lost or not transmitted. 25. **Loss of Time**: The amount of time that is wasted or not used effectively. 26. **Quantity of Substance**: The amount of material present in a system. 27. **Reliability**: The probability that a system will perform its intended function without failure. 28. **Measurement Accuracy**: The degree to which a measurement conforms to the correct value. 29. **Manufacturing Precision**: The degree of exactness in the production of components. 30. **External Harmful Factors Acting on Object**: Environmental factors that negatively affect an object. 31. **Internal Harmful Factors Acting on Object**: Internal factors that negatively affect an object. 32. **Ease of Manufacture**: The simplicity with which a product can be manufactured. 33. **Ease of Operation**: The simplicity with which a product can be used. 34. **Ease of Repair**: The simplicity with which a product can be repaired. 35. **Adaptability or Versatility**: The ability of a system to be used in different ways or for different purposes. 36. **Device Complexity**: The number of components and the intricacy of their interactions in a system. 37. **Difficulty of Detecting and Measuring**: The challenge in identifying or quantifying a parameter. 38. **Extent of Automation**: The degree to which a process is performed automatically. 39. **Productivity**: The efficiency with which a system produces output. These parameters help in identifying and resolving contradictions by providing a structured way to analyze and improve systems.