Job and resource structures in batch process industries are generally very complex, which renders the assessment of what workload can be completed during a specific period very difficult. Order acceptance procedures have a considerable impact on the mix of jobs that need to be scheduled, by refusing specific jobs from the total demand. In this paper, we investigate whether jobs with specific characteristics are systematically rejected by an aggregate acceptance procedure and a detailed acceptance procedure. We find out that, while both procedures are selective in the kind of jobs they accept when job mix variety is high, the detailed acceptance procedure underestimates the consequences on the total makespan of significantly changing the job mix
