Approaches to job design models such as the JCM, DCSM, VM, ERI Model and STST tend to focus on changing the nature of work and downplay the importance of ancillary interventions. For example, the JCM, DCSM, VM and STST all indicate the importance of job autonomy and skill use, yet without adequate training in decision-making, problem-solving and other relevant skills, improving opportunities to exercise control and use skills may be counter-productive.