Vendor Delivery Dates and Planning Calendar

Dear All,

I have searched through the forums and have struggled to get an answer that works.

My scenario is as follows

Vendor A delivers Material A on Tuesday's and Thursday's

I have created a planning calendar for Weeks(workdays) for Tuesday and Thursday and then assigned the calendar to Material A

When I run MRP on PD and Lot size PK

I then run MRP and it brings back a Preq for Wednesday - even though this is not on the planning calendar!

Secondly, if I have Vendor B who also delivers Material A but on Fridays how do cater for that as planning calendars are only assigned to materials and not vendors.

Rgds,

Mark