please provide cycle in MM reservation. how to block a stock using reservation?
With this component, you make a request to the warehouse to keep materials ready for withdrawal at a later date and for a certain purpose. This simplifies and accelerates the goods receipt process.
A reservation for goods issue can be requested by various departments for various account assignment objects (such as cost center, order, asset, etc.).
The purpose of a reservation is to ensure that a material will be available when it is needed. It also serves to simplify and accelerate the goods issue process and prepare the tasks at the point of goods issue.
It is also important that reservations are taken into account by Material Requirements Planning (MRP), which means that required materials are procured in time if they are out of stock.
Planning a Goods Issue
You can handle both planned goods issues and unplanned goods issues.
Manual and Automatic Reservations
The R/3 System supports manual and automatic reservations. Manual reservations are entered directly by the user. Automatic reservations are generated automatically by the R/3 System. There are two types of automatic reservations:
Reservations for orders, networks, WBS elements:
When an order, a network, or a project is created, the components from the warehouse are reserved automatically.
Stock transfer reservations:
If reorder point planning is used at storage location level and the available stock on hand falls below the reorder point, the system generates a stock transfer reservation in the plant for the replenishment quantity.
You can refer this link for detailed information on creating, changing, displaying and managing reservations
Thanks & Regards,