A conceptual model for measuring employee performance

The book Measuring and Managing Performance in Organizations introduced a simplified framework that enables some surprisingly nuanced thinking about the traps of measuring workers. (1996)

Building the model

First, our simplified project has only two types of tasks: A and B. If we make a simple chart showing the amount of each task done by a worker, we can plot different points corresponding to different allocations of time between the two tasks.

In this chart of work done for A vs work done for B, we see two points. One point corresponds to 100% of time allocated to A and one point corresponds to an allocation of 50% of time towards A and 50% of time towards B.

If we plotted all possible allocations possible for a fixed amount time, we would see a line. We can even plot multiple lines corresponding to different amounts of time:

In this chart of work done for A vs work done for B, we see two lines. One line corresponds to 30 hours of work and represents all possible allocations of time between A and B; the other line corresponds to 40 hours of work.

The last thing to add to our model is the understanding that the customer has a preferred allocation between A and B.

In this chart of work done for A vs work done for B, there is a green line representing the customers preferred ratio of 50% A to 50% B.

Using the model

This simple model allows us to immediately start making observations:

We also have the framework to start seeing a negative implications of a common management behavior: measuring only one part of a tradeoff between two dimensions.

Consider the scenario where one dimension that is easily measured and one that is not, e.g. Quantity/Quality or Features/Reliability. While it may be tempting to measure what can be measured, the challenge is that people will naturally change their behavior if they know they are being measured. Therefore, measuring only one dimension of such a tradeoff will always lead to a dysfunctional allocation.

Robert D. 1996. Measuring and Managing Performance in Organizations. Dorset House.

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