Operators´ mental strain induced by information support in cell production

Human-centered characteristic of cell production systems may meet the diversified production and quantity requirements. However, there are two problems: firstly, assembly efficiency depends on operator´s individual skill; secondly, it may need high concentration of an operator to cause mental strain to them. Information support provides a solution to improve operator´s operation performance and to reduce his/her mental strain. Appropriate density of information should be given to an operator to prevent excessive mental stress on him/her. In this study, operators´ performance such in term of and assembly errors is evaluated when an information support system is introduced. Mental stress is also evaluated by physiological parameters such as skin impedance, salivary alpha-amylase, and critical fusion frequency (CFC) to investigate effective density of information. The experiment results show that as information density increase, the induced mental strain increased. An effective density of information is obtained from the experiments to minimize assembly error. The results are valuable to estimate effective information density in information support system.