States of Plant With Reference to Maintenance Engineering Functions

Often people speak & take an account of the terms such like off time & on time or productive hours & non-productive hours based on the running of the plant. Whereas, with reference to the plant engineering & management and maintenance functions the plant is generally found in one or more of the following states:

• Dead state. (With or without undergoing maintenance activity).
• Under shutdown.
• On Production. (With or without on line maintenance).
• Under emergency maintenance state.
• Production outage. (With or without undergoing maintenance activity).
• Waiting for maintenance.

  Figure: Model for Plant States (with Reference to Maintenance Objective and Function)