AVEVA™ Manufacturing Execution System

OEE Calculations

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The OEE metrics for the time period from 6 am to 12 pm are calculated as follows.

Line Availability
Line Availability	=	Bottleneck Entities Runtime / (Bottleneck Entities Runtime + Bottleneck Entities Downtime)
	=	((Packer Runtime 6 am–7 am) + (Filler1 Runtime 7 am–9 am) + (Filler2 Runtime 7 am–9 am) + (Packer Runtime 9 am–10 am) + (Sleever1 Runtime 10 am–12 pm)) / ((Runtime Total + (Filler2 Downtime 8 am–9 am))
	=	(3,600 + 3,600 + 3,600 + 3,600 + 5,400) / (19,800 + 3,600)
	=	19,800 / 23,400
	=	0.84615 (84.62%)

Quality
Quality	=	Packer Good Production / ( Packer Good Production + Rejected Production at All Entities)
	=	44,050 / (44,050 + 595)
	=	0.98667 (98.67%)

Performance
Performance	=	Actual Production Count / Expected Production Count for Bottleneck Entities
	=	Actual Production Count / ((Packer Expected Production 6 am–7 am) + (Filler1 Expected Production 7 am–9 am) + (Filler2 Expected Production 7 am–9 am) + (Packer Expected Production 9 am–10 am) + (Sleever1 Expected Production 10 am–12 pm))

Calculating the expected production count for each entity when it was a bottleneck entity by using the following equation:

Entity Expected Performance

Entity Production Rate x Runtime Duration (in seconds) x Entity Default Batch Size

Yields the following:

OEE
OEE	=	Availability x Quality x Performance
	=	0.84615 x 0.98667 x 1.1073
	=	0.9244 (92.44%)