We have created a Sales order for some materials. All the materials are subjected to MRP. In mateial master We maintian all Except MRP group. Also we maintain the Requirement type etc with respect to the Mateial Type in configuration. In our case when we created the Sales order some of material are picking the requirement and same was shown in MD04 also in availbility check we can able to check the reqirement but some of the msaterials no requirement generated in availibility and not shown in MD04. All the materails are belongs to material Type FERT. Let me know some materials are not Picking the requirement and not shown in MD04.
When we maintain the MRP Group the materials were picking the requirement in availbility and alos shown in MD04.
Will anone explain the difference between the both setup like Picking requirement with respect to Material Type and Picking Requirement with respective to MRP group etc. aslo when and where we can user those things