Graphical Scale Methods

Continuous, semi-continuous and discontinuous scales.

The graphic scale method is one of the most widely used instruments to measure performance by means of previously defined and graded factors.

A double-entry questionnaire is used where the horizontal lines represent the evaluation factors and the vertical columns represent the degrees of variation.

The continuous graphic scales only define the extreme points of performance (unsatisfactory to excellent), allowing the evaluation to be placed at any point on the line that joins them.

Semi-continuous scales include intermediate points defined to facilitate the location of the evaluator's response.

Finally, discontinuous scales require the rater to choose between established and previously described marks, such as satisfactory, fair or good.

Each factor should be accompanied by a simple and objective description to maximize the accuracy of the measure and avoid ambiguities in the interpretation of the observed behavior.

Advantages and limits of graphic visualization

This method offers significant advantages in that it is an easy-to-understand and simple-to-apply tool for supervisors.

It provides a comprehensive and summarized view of the performance characteristics that the company values most, simplifying the work of recording and subsequent statistical analysis.

However, it has critical limits: it lacks flexibility, forcing the evaluator to rigidly adjust to the instrument instead of the instrument adapting to the worker.

In addition, it is vulnerable to subjective distortions and personal interference by the evaluators, who may fall into routine or standardize results without a thorough analysis of each individual case.

To mitigate these risks, constant training of raters and validation of the results obtained is required to ensure that they reflect the reality of the position and not just a momentary perception of the immediate boss.

Summary

This method uses a double-entry questionnaire whe