Method 2: To increase the production line efficiency We observed that the line efficiency of the first proposed method was not much improved. Therefore, we proposed the second method to increase the efficiency without maximum resource reduction. On the other hand, we tried to reduce the waiting time among five stations to increase the efficiency. Then, we reallocated one, five and one workers in stations 1, 4 and 5, respectively, and other stations remained
the same as shown in Table 1 and Figure 3. The results showed that the line efficiency was increased to 88.33%. Similarly, we calculated the four worker’s wages and cost saving to be 437,400 baht/year. The results are shown in Tables 1 and 2.