The job of Steel Mill Inspector was analyzed in terms of the sequential constraints existing among the job's operations. This measure of environmental variability was related to cognitive complexity--a measure of the individual Inspector's ability to process job-related information. As predicted, satisfaction with the work itself was an inverted U-shaped function of cognitive complexity. In addition, cognitive complexity was significantly related to satisfaction with four other aspects of work--supervision, promotions, amount of feedback and amount of say in how the work is done. The investigation supports the notion that worker differences are important in understanding the reactions of workers to job characteristics and to changes in those characteristics which might result from job enlargement and other programs. (NTIS)