1. In some environments, it is hard to measure workers’ performance on anything other than a relative scale. For example, common and unmeasurable factors may be so important that it’s really hard to know what constitutes a good level of performance: All we can really know is how workers performed relative to each other. Or, a new technology has just been invented, and no one really knows how effective it can be when used correctly and carefully. Given that a principal in this situation has no choice but to measure performance on a relative scale, what problems would you advise her to look out for?