You are appointed the manufacturing head of a plant manufacturing automobiles. The factory assembles sub-assemblies into a full truck on an assembly line having 22 work-stations. You have reviewed the overall direct labour hours per truck produced and find that there is significant adverse variation from the industry benchmark for similar trucks and companies. You want to get a quick idea of the problem areas before commissioning a full time study of individual processes. You ask for a work-sampling study instead. What are the likely components that get looked at in this study?