Using the Requisition Worksheet to automatically calculate and plan the replenishment of items is something that could be done at any time. It could even be done progressively, starting with a few items to get familiar with the requisition functionality and adding new items to this process by progressively configuring their replenishment parameters.

In this case, the right time is anytime, whenever you are ready for it.

In the previous section, when talking about the actions required to start using the Microsoft Dynamics NAV Fixed Assets functionalities, we said that fixed assets' movements will have to be posted with the acquisition cost and depreciation—the fixed assets without G/L integration before starting to utilize them and the fixed assets' functionality to calculate your depreciations.

If you turn Item Tracking on for your items, it is because you want or need to be able to have traceability of your products.

Choose an appropriate time to do so because you will have to know when your traceability begins and that before that date there is no traceability at all.

You may have a legal requirement that says that after a specific date, traceability will be mandatory for the kind of items you sell or manufacture. If this is the case, that date will probably be the right time.

If this is not the case, or you have a period of time to implement it, you will have to choose a specific date. The beginning of a fiscal year or the beginning of a specific month are dates that are easy to remember for anyone. They could be good candidates.

But you also have to take into account that turning Item Tracking on, especially if it has to be done for a large number of items, or if you have a lot of data related to your items or a lot of pending documents, is something that will be time consuming. You will have to rename old items, create new items, create their related data, and go through all pending documents. You will also have to reduce the quantity in hand of the old items and do a physical inventory of the new items to write down their tracking, and be able to increase the inventory of the new items and assign them the right tracking.

Even if you develop a process to rename items, create new items and all their related data and go through all pending documents. You have to know that this will be a time-consuming process if that has to be done for a lot of items, because the renaming instruction in Dynamics NAV takes an extremely long time to execute.

There is something else to take into account. When doing all of this, you do not want any users to be posting any item entries as they will either be locked up as the process is running, or they may transact on an item that may not have all of the settings completed yet.

Keeping all of this in mind, you will probably have to choose a time to implement the change on items outside regular working times: a long weekend or a holiday period.

You could also choose to implement Item Tracking progressively, a few items at a time. That will take a shorter time per partial implementation, so it will be easier to find the time to do it, but the global process will take longer and there will not be a single date on which Item Tracking functionality was turned on.

In this example in which a functionality of Volume Discounts—which has Volume Discount Ledger Entries—wants to be extended by adding application functionality similar to how applications work both in Customer Ledger Entries and Vendor Ledger Entries, any time is good to implement the change. Whenever it is developed and ready to go live will be considered a good time to implement this change.

The only thing to take into account is that the list of Open Ledger Entries has to be prepared for the initial application to be done. Some manual work will have to be done to post this initial application, but there is no need for the users to stop working with the system.