International Maritime Organization accident investigation reports cite that about a quarter of all maritime accidents are initially due to machinery failure [1]. Therefore, maintenance of machinery in marine systems is very important. Moreover, maintenance of machinery also minimizes the severity of the failure, prevents unexpected downtime, extends the life of machinery, and helps decrease the number of accidents. Maintenance of on-board ship machinery is conducted by the seafarers and is expected to contain unintentional errors. According to a previous accident investigation report, around 80% of shipping accidents are due to human errors [2]. Examples of previous accidents due to human errors during maintenance activities on marine machinery are explained by Islam et al. [3]. Different internal and external factors affect the seafarers’ performance and sometimes those factors are responsible for human errors. Internal factors such as lack of training and experience, and a high level of fatigue have significant impact on seafarers’ performance [4]. These factors have either a positive or a negative impact on seafarers’ performance. For example, high levels of training and experience has a positive impact on seafarer’s performance, whereas a high level of fatigue has a negative influence on seafarers’ performance. Details about the lack of seafarers’ training and experience, and a high level of fatigue are explained by Islam et al. [3,5].