Null Costs

Sometimes when researching one problem, I stumble over others & could use some guidance where to look.

What would cause new items that do have ECL customer orders to not have any entry in CMF cost master? I have been looking for miscoding in INV100 or MRP140. I have a suspicion that we might have some people setting up new items where in their training, some key field value got dropped, and I'm not seeing it.

Some of these items are type-7 raw materials, that have recently been added to our system, at child bottom of some newly engineered parts we need to make. The problem is that buying parts before they got populated with standard cost, understates inventory value in General Ledger, then when the vendor payable invoice arrives, we have more accounting chaos. I can understand items setup in BPCS in which no one has yet populated the standard cost from zero to whatever, but what might we be doing wrong that items get active in BPCS with requirements, inventory, but there is absolutely no record in CMF master cost for that item facility combination?

These null cost items are also type-1 master scheduled but no BOM or routings, such as samples that are made outside of BPCS but use ORD to ship bill customer, then if & when customer approves our pricing & samples (in competition with other vendors) we setup the BOM & Routings. The problem is that some reports that show what we shipped, cost of those parts, written in query/400 which matches records across several files. No record in one of the files, no detail on the report.

We are 405CD by facility.
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Al Mac
BPCS/400 Computer Data Janitor