1 attribute product - attributes have varying scenarios:
option 1 - status 'active', inventory on hand
option 2 - status 'active', no inventory on hand, on order > 0, future backorder date
option 3 - status 'active', no inventory on hand, on order > 0, no backorder date (past backorder date or today's date behave the same)
option 4 - status 'discontinued', inventory on hand
option 5 - status 'discontinued', no inventory on hand
option 6 - status 'out of stock', no inventory on hand
option 7 - status 'out of stock', inventory on hand
option 8 - status 'inactive'
option 9 - status 'active', no inventory on hand, on order > 0, future backorder date, ignore on order and backorder is checked
option 10 - status 'active', 2 on hand, out of stock point = 2
option 1 - status 'active', inventory on hand
option 2 - status 'active', no inventory on hand, on order > 0, future backorder date
option 3 - status 'active', no inventory on hand, on order > 0, no backorder date (past backorder date or today's date behave the same)
option 4 - status 'discontinued', inventory on hand
option 5 - status 'discontinued', no inventory on hand
option 6 - status 'out of stock', no inventory on hand
option 7 - status 'out of stock', inventory on hand
option 8 - status 'inactive'
option 9 - status 'active', no inventory on hand, on order > 0, future backorder date, ignore on order and backorder is checked
option 10 - status 'active', 2 on hand, out of stock point = 2
