Stone Raymond (1991) mentions in human resource management, Occupational Health and Safety Acts (OSHA) are aim at preventing labor’s injuries. Human resource manager must provide fully information, training and instruction for employee to perform their work. HR manager task is to making arrangement of training connection with use, handling, storage and transport of plant equipment at the workplace. Besides that, company should maintain the workplace in a safety condition and without risk to health. Safety should be essential part of performance management, a high value organizations must make sure their employees are under safety condition; because employees are the manpower to help the company earn profit. Increase employee commitment, motivation and productivity, reduced operating costs and enhanced public image must always integrate with health and safety objectives with strategic business objectives for organization strivings to achieve competitive advantage (Stone, 2002).
Workload define as the amount of work that individual has to do, it can classified into two group which is quantitative (the total amount of work to be done) and qualitative (the difficulty of the task). Spector (1997), defined workload as demands of task placed on the employee by the job. The total amount of the task that assign by the supervisor or employers, excessive of job demands can affect job dissatisfaction. Workers will simply do their task if they receive excessive of job demands, the output of products or services may affected, thus, it may lead to customer dissatisfaction. Other than that, stress which can influence retention. Workload is often studied in two ways. One is qualitative workload, which is the difficulty of job task either physical or mental. It can explain as the mission of task that workers have to complete; Second way is quantitative workload, which means the amount of work that employee complete (Kaplan, 2009). Besides that, Caplan & Jones (1975) and Cobb & Rose (1973) mention workload result when the job requires the fast speed of work, over limit output or concentration. Some of the service industry require a fast speed services to achieve over limit output, they concern about the customer’s reaction. In other way, research specifies workload is not just the total amount of work that make the satisfaction and successes from employee, but also the variety to which employees have to resources to do work well, resources can be total lead time, equipment use in workplace and other supports. Ejaz (2011) mention employees prefer to have less work with them while managers try to increase the production from existing workers by overloading them. In the same way, employees yearning to earn more by minimum efforts while employers try to pay less to the workers to keep the costs low. In this case, performance of employees may affected and some others employees may choose to leave the company and search for another better choice. (Hussain Shah, Jaffari, Aziz , Ejaz, Ul-Haq, & Raza, 2011)(责任编辑：BUG)