Workload/performance modelling (Atlas)
Many work settings involve operators interacting with technology to accomplish tasks that are not self paced, but in which demands are dictated by elements of the functionality of the technology (such as in control rooms, signalling centres, train cabs, air traffic control, etc). Ideally the demand placed on the operator should be optimum in terms of time pressure, complexity and avoid the need to divide attention between two or more activities.
When workload by any measure exceeds optimum levels, there can be an increase in operator stress and a loss of performance quality, possibly leading to error or even task failure. In a safety critical application this could result in damage to property or harm to people or the environment. In contrast when workload demands are very low operator arousal will be depressed causing inattentiveness, distraction and poor vigilance. Over prolonged periods this can contribute to low morale and job dissatisfaction leading possibly to absenteeism. Not to mention the inefficiency of possible over-manning.
The optimum level of workload for operators can be determined by using performance modelling techniques. Workload analysis evaluates the feasibility of the demands imposed on the human role in the proposed system, and the information produced by workload modelling feeds directly into the production of system requirements. Workload modelling outputs can also inform future design decisions regarding function allocation, manpower and job role requirements, as well as interface design.
Human Engineering has a human performance (workload) modelling tool called Atlas. Atlas has been applied on numerous projects for workload and manpower assessment in sectors such as: rail, aviation, oil & gas and defence. The benefits to our clients are that workload has been optimised for the improvement of performance, reduction of risk, and the optimisation of operational efficiency.