Question { 16400 }

how many no of release strategies can be assigned to
purchasing document like PRs and POs?

Answer

Yes you can set n number of release strategy depending on
the organization's requirement & maximum 8 level of
approval can be configured in release strategy. it's
nothing but release code.

Question { TCS, 16918 }

What is difference between plant define under company code
and plant define under purchasing organization?

Answer

See, Plant can be defined under a company only. this
company will be responsible for accounting of it's plant,
while plant can be defined under more than one purchasing
organization. & these purchasing organizations will be
responsible for procurement activities of it's plant.