Overall Equipment Effectiveness (OEE) and Overall Plant Efficiency (OPE)

Overall Plant Effectiveness (OPE) is the ratio in percentage of
Actual Accepted Quantity Produced (Q2) to the Quantity that should have been produced in Total Scheduled Hours (T2xN)
That is, OPE = {Q2/T2xN}x100%
And, similarly,
Overall Equipment Effectiveness (OEE)
Is the ratio in percentage of
Actual accepted quantity produced (Q2) to the Quantity that should have been produced in Total Loading Hours (T3xN)
That is, OEE = {Q2/T3xN} x100%
(Where N is the 100% Rated Output per Hour)

Overall Equipment Effectiveness (OEE)
Can also be expressed as
OEE = Availability x Performance Rate x Quality Rate
Where,
Availability is the ratio in percentage of
Total Operating Hours (T4) to Total Loading Hours (T3)
Performance Rate is the ratio in percentage of Actual Quantity Produced (Q1) to Quantity that should have been produce in Total Operating Hours (T4)
Quality Rate is the ratio in percentage of
Actual Accepted Quantity Produced (Q2) to Actual Quantity Produced (Q1)