🔍 Key Concepts

• Difference between corrective, predictive, planned, and condition-based maintenance • How manufacturers often schedule maintenance using running hours (e.g., every 2,000 hours) • The idea of following a fixed schedule versus reacting to problems or measured condition

💭 Think About

• Which option best matches maintenance that is done at set intervals based on hours of operation, regardless of the current condition of the machinery? • Which type of maintenance waits for signs of wear or changing condition before acting, and which one follows a calendar or hour-based schedule? • Think about what a manufacturer typically puts in the manual: are they asking you to constantly measure condition, or to service at specific hour or time intervals?

✅ Before You Answer

• Identify which system is reactive after a failure and eliminate that choice • Identify which system relies mainly on monitoring condition or performance data (e.g., vibration, temperature) and separate that from hour-based schedules • Determine which system is usually set up as a formal program of tasks based on time or running hours following the manufacturer’s manual