What is Purchase Requisition?
User identifies the requirements and submit the requirements with all details to purchasing department to procure the same. The document created with detailed requirement is called the purchase requisition.
Transaction codes for Purchase requisition
The following transaction codes used to process purchase requisitions,
ME51N – Create purchase requisition
ME52N – Change purchase requisition
ME53N – Display Purchase requisition
Transaction code: ME51N Will be used to create the purchase requisition. The Following is the initial screen of the purchase requisition.
The Following 3 sections available in the PR Creation screen,
Header
In the header, user can convey the common text related to all the items of the purchase requisition and PR Release strategy tab also available once PR Release strategy mapped.
Item Overview
In this section, user can enter the details of the required material, Quantity, Dates, Plant, Storage location, Requisitioner and Tracking number….Etc
Item / Item Details
In this section, there will be multiple tabs and the respective data can be seen in the respective tabs. Various types of texts available to capture the data at material code level.
First of all, user should select the document type based on the requirement.
The following are the screen shots of Purchase requisition after entered the data.
There will be lot of tabs with respective data will be available. These tabs available for each and every material with the respective material data. The Following are some of the tabs,
Tab: Material Data
Tab: Quantities/ Dates
Tab: Valuation
Tab: Texts
Once all the details checked and confirmed, user can save the purchase requisition by clicking the following icon 
or click on “Control + S” in the keyboard. Once saved, Purchase requisition number generated by the system as per the configuration and the same is shown in a message.
Once the PR is created, we can use the following transaction codes to change or view the same,
ME52N – Change Purchase Requisition
ME53N – Display Purchase Requisition