hi ludwig, thanks for your response
For No 1:
Have you setup the damaged machine as an inventory item or do you use something else for tracking it?
==> yes, i treat as inventory item (let say item code : DMG-001 damage machinery). the root of damage is "cable"
For No 2:
Fixing means only that you do some repair services that is that you only require people's time doing the repair or do you also need spare parts and other things to do the repair?
==> while doing service for damage machine, i use my resources, also i have cost of hour for my technical.
For No 3:
Can you elaborate what you mean here exactly? Do you 'destroy' a good machine to get the parts necessary for repairing the damaged one or did I get you wrong here?
==> beside i'm using my technical to fixing this machine, i also using other part of inventory from other machine in good condition (let say item code : FG-001 - good machine), i release the cable of FG-001 then i put it on damage machine.