Just-in-time inventory assumes all of the following, except: 1. Zero defects. 2. Resources will only be introduced

Question:

Just-in-time inventory assumes all of the following, except:
1. Zero defects.
2. Resources will only be introduced as they are needed.
3. Just-in-time inventory presumes first-in, first-out costing.
4. Production of components only occurs only when requested further downstream in the manufacturing cycle.