feat: add provision for process loss in manufac

[18alantom]

Description

BOM Functionality

• Scrap table item has Is Process Loss checkbox, this sets the item as a Loss Item.
• Is Process Loss is set when Scrap Item == Finished Item.
• Process Loss is different from Scrap in the sense that it is lost and has no value (scrap may have value) so the rate will be set to 0.
• Dialog allows setting process loss as a percentage of finished item quantity.

Stock Entry (Manufacture):

• On setting items using WO or BOM, Is Process Loss value carries over.
• This implies a 0 rate (unless changed), and a different completion calculation.
• Process Loss calculation: Finished Item Quantity = BOM Quantity - PL Item Quantity

Process Loss Report

• Shows aggregated process loss value and quantity across stock entries, grouped by Work Order.
• Process Loss Value = Process Loss Qty * sum(Total Incoming Value) / sum(Actual Produced Qty)

Documentation PR: frappe/erpnext_documentation#356

[stale]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed within a week if no further activity occurs, but it only takes a comment to keep a contribution alive :) Also, even if it is closed, you can always reopen the PR when you're ready. Thank you for contributing.

[ameerbab]

@18alantom
Any updates about the beta release ?

[18alantom]

@18alantom
Any updates about the beta release ?

@ameerbab still waiting on review, once done should be merged and out by the end of this month.

[marination]

@18alantom add a test for process loss impact on Manufacture Entry (Stock Entry) and Work order too. So BOM (with process loss) -> WO -> Manufacture Entry -> Check impact on WO if it is marked as completed

[marination]

Unrelated closing voucher and appointment tests failing

[ameerbab]

Dear @18alantom,

I appreciate your effort and thanks for your contribution.

[18alantom]

@ameerbab you're welcome, much appreciated! :)