Tech Magazine
Practice of GD.findi

Tech Magazine Practice of GD.findi

The 2nd: Know the quantity of intermediate inventory!
~ What would be the quantity of intermediate inventory shown in GD.findi? ~

In this time of utilization technique by GD.findi, we would like to suggest about the "quantity of intermediate inventory". First of all, as the first part, we introduce the overview regarding the observation of the number of intermediate inventory and its influence on the post-process.
Intermediate inventory (or work in-process inventory, inter-process inventory) is set up to fill the capacity gap between processes. However, the intermediate inventory contains the following challenges.

  • If it is too small, there is concern for occurring a "waiting process," or a "shortage" beforehand.
  • If it is too many, it affects to bad influences such as "risk of disposal", "quality degradation due to deterioration", "cost increase of stock keeping".

Considering these factors, it is obvious that there are disadvantages if it is too small or too many. It is necessary to have an appropriate amount "to fill the capacity gap between processes. For this reason, it is also very important to know the transition of the intermediate inventory quantity.

Then, how can we know the transition of the intermediate inventory quantity?


For example, if it attempts to perform a parallel processing composed of a plurality of previous processing or to predict a case of more complicated flow,

  • What would be the differences in performance between processes?
  • When would be the all components required for the post-process to be completed?

These problems have emerged.
In this way, the inventory quantity may be difficult to forecast by static consideration.


If it is hardly possible to predict the inventory quantity, it is necessary to "observe" the inventory quantity and the post-process operation status.
In GD.findi, this "observation" is made possible by using the function of "initial stock" and finding the result of simulation.


Let's take an example of a production line like the figure below to see how to know the minimum amount of stock that will not cause waiting in the post-process.
Since processing capacity is higher in the post-process than in the previous process, waiting will occur if there is no intermediate inventory. Let's observe the operation status of post-process and the inventory amount of intermediate stock through GD.findi.


Through GD.findi, it creates the following project. For this time, we set the production target number to 250 and the initial stock to 100.

*The specific creation method will be announced in the next issue.


We find the result after competing simulation.
With this setting, you can see that stocks run out of the way and the post-process is in a waiting status.


This time, we introduce GD.findi to observe the inventory quantity and the post-process operation status. Based on this observation result, it is also possible to obtain the necessary minimum inventory due to the difference in capabilities between processes.


Next time of issue, we will introduce the specific method of creating the GD.findi project used here and the things to observe from the simulation result. Please look forward to it. Please expect it.
For more details regarding GD.findi, please find the webpage or contact GD.findi email address as below.

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