A worker productivity model.
Eugenio López-Ortega, Rita Saloma-Velazquez
Institute of Engineering. National University of Mexico (UNAM)
Apdo. Postal 70-472, Coyoacan
04510, México, D.F.
Phone/Fax: (52) 55 56 22 34 15
A model with the purpose of explaining the behavior or the productivity of a worker was
constructed at the Engineering Institute of the National Autonomous University of
Mexico (II-UNAM). The objectives of this work are:
- To obtain a clear causal model that identifies in a simple manner how certain
factors relate to yield a productivity level.
- To have a model that can be used to simulate the response of the productivity of a
worker to different actions. This would help companies in diagnosing the quality
of their treatment of human resources and in designing new policies to improve
- To have a model which helps managers, directors and supervisors in learning the
impact of their decisions on the complex phenomenon of the productivity of a
In 1978 James C. Hershauer and William A. Ruch (Hershauer and Ruch, 1978)
developed at the Arizona State University, a similar model to illustrate the way in which
certain factors interact to achieve the productivity level of a worker. This model was
considered a novelty and was cited in a good number of publications about productivity.
Hershauer and Ruch reported that the model was used at Lincoln Electric as a training
tool for supervisors at the production lines and it proved to be valuable in explaining the
complexity of the relations that lead to the level of productivity of a worker. In spite of
this, the model was never traduced into a program, nor was it used for simulation. The
authors considered impossible to measure the factors of human behavior and business
management in a quantitative manner in order to feed a simulator.
The model developed at II-UNAM takes into account...