Fig. 4 refers to the situation of no interchangeable machines. Curves do not cross each other, as in the situation of interchange- able machines. However, in this case, the release curve stays below the dispatching curve for each level of norm tightness. This shows that making the routing decision at order release is preferable.
Fig. 5 refers to a 20% interchangeable situation, which means that 20% of the jobs can be carried out on both machines. As can be seen, the two performance curves cross each other, meaning that the level of norm tightness influences the routing decision.
We can conclude, from results, that the routing decision is influenced by the degree of machine inter-changeability under continuous order release. This is consistent with the research of Henrich et al. (2007) in a similar manufacturing environment, for discrete order release. This suggests that the routing decision is not influenced by the timing convention, continuous or discrete.
By studying Figs. 3–5, it is possible to conclude that: (1) a higher degree of inter-changeability leads to a considerable improvement on the system performance in terms of time in system and (2) routing at dispatching seems to be less robust to the degree of inter-changeability than routing at release.
Fig. 6 shows time in system behaviour for the routing decision at release and dispatching, for the 20% interchangeable situation,
Fig. 4 refers to the situation of no interchangeable machines. Curves do not cross each other, as in the situation of interchange- able machines. However, in this case, the release curve stays below the dispatching curve for each level of norm tightness. This shows that making the routing decision at order release is preferable.
Fig. 5 refers to a 20% interchangeable situation, which means that 20% of the jobs can be carried out on both machines. As can be seen, the two performance curves cross each other, meaning that the level of norm tightness influences the routing decision.
We can conclude, from results, that the routing decision is influenced by the degree of machine inter-changeability under continuous order release. This is consistent with the research of Henrich et al. (2007) in a similar manufacturing environment, for discrete order release. This suggests that the routing decision is not influenced by the timing convention, continuous or discrete.
By studying Figs. 3–5, it is possible to conclude that: (1) a higher degree of inter-changeability leads to a considerable improvement on the system performance in terms of time in system and (2) routing at dispatching seems to be less robust to the degree of inter-changeability than routing at release.
Fig. 6 shows time in system behaviour for the routing decision at release and dispatching, for the 20% interchangeable situation,
การแปล กรุณารอสักครู่..