Can somebody give me definition and it's formula for calculation of the following terms: 
1. Equipment       Uptime 
2. Equipment       Efficiency
3. Equipment       Effectiveness

Vivek.K     

The question is too vague to give a precise answer. Uptime, Efficiency and Effectiveness will depend on how you have defined these terms, what sort of plant/process you are measuring and how you measure them in practise.

Having said that, here is an attempt at answering your question
 
1. Uptime is the total time that a machine or process is available to perform its function.
            
    UPTIME = Total Time Available - Downtime
 
    Downtime consists of both planned and unplanned events.
 
2.  Equipment Efficiency - What do see as the difference between 2&3? 
 
3.  Equipment Effectiveness as defined by Overall Equipment Effectiveness:
 
     OEE = Availability Rate x Performance Rate x Quality Rate
 
     Availability Rate = %Uptime of Total Time

Performance Rate in most cases is related to Mean Speed as a percentage of Max. Speed. Utilisation is also a concept that fits into this category.

Quality Rate is an expression of Good(conforming/saleable) products as a percentage of total products made.
 
A, P and Q are all efficiencies in their own right. 
 
Hope this helps.
 
Wayne

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