If you don't make a plan, you don't know how much to buy. If you buy too much, you'll be pressed down on the stock. If you buy too little, you'll be out of stock. Therefore, the rolling months of this rolling plan are related to the purchasing cycle of materials. You can buy as many months in advance as possible.
Then, on May 22nd, June will be determined, and June will be 205. Then ± 50 in July and ± 30 in August will not matter, but there should be a positive and negative. This is called a rolling plan in the medium term.
After this plan is made, we can cope with its changes.
"Rules of the game" between sales and production planning
After this plan is completed, we need to make a rule with the sales department, that is, when the sales department receives 210 units of a product in June, it should not discuss with the production department, but continue to accept it, because the materials have been bought. Can I pick up more than 210 units? Yes, but we need to ask the production department if there are any materials? Can you do it? If you can, then you can't. Make the rules.
If you can't guarantee that you can take it, don't promise to avoid hurting the sales. In fact, customers are most afraid of not delivering on time. Therefore, the customer does not care about our late delivery, but about on-time delivery. If the rules are made and the goods promised to the customer are delivered to him on time. Therefore, the production department must make a rule with the sales department.
After the rules are set, what is the plan to do?
The planning department will work out the plan on May 20th and hand it to all departments, including production department, material department and purchasing department
Let everyone sign, that is to say, you execute according to this number.
Here is a case, according to this number, n months, n plus January, n plus February, according to this number, are you ok? Just sign if you can. If you can't, you can put forward what conditions you need. For example, it has been proposed that more talents are needed. The planning department will take the lead in bringing the personnel department to a meeting to say that more people are needed. When will the number be increased? Before May 14, 50 people will be recruited. The personnel department said if there was any problem, so the plan was made.
After making the plan, the personnel department must recruit 50 people back before May 14, so the plan can be successfully completed. If the personnel department says it can't recruit back, the plan will have to be discussed separately.
So, when this rule changes, how to discuss it?
Once the rules and the plan are settled, every department will follow them. Then the plan can be completed.
Short term plan
Short term plan is monthly plan or weekly plan or annual plan. Can that plan be moved? For example, we have set a schedule for 100 months in May, and from April to may, can we move these 100 months? If you move again, it's called order insertion. There are rules for inserting orders. If you want to produce 100 more for inserting a, does B need to produce less? A can't get in, B can't get out, then nobody can do it. Therefore, the sales department should also have rules. If you want to insert an order and push it back, you should tell me (production department). Therefore, it is normal for the plan to change.
The market is changing, the customer is changing, we can only change, so the JIT production plan is a production plan to change, is a very good production plan. JIT production planning must have a set of rules of the game with the sales department, but also have a contingency program.
