3. PERFORMANCE ANALYSIS TOOLS › 3.3 Data Clustering Analysis › 3.3.2 Usage Guidelines › 3.3.2.1 Historical Approaches

3.3.2.1 Historical Approaches

One early approach presented to performance analysis was the
equivalent job methodology presented by Jenkins in 1977
(JEN77).  Most simply described, the resources consumed by
all of the workload elements (for example, job, steps,
transactions)  over some number of weeks or months are
divided by the number of workload elements that were executed
during the period. The result of this division is called an
equivalent workload element.

An equivalent workload concept initially appears to be very
attractive since you can estimate future resource
requirements by simply estimating the number of equivalent
workload elements.  This value is multiplied by the
equivalent workload description to calculate the future
resource requirements.