It means

A procedure is a sheet of instructions for you to follow steps by step. Example, How to make a cupcake. A procedure includes Materials we need,  Method and INSTRUCTIONS. Proper means like a main one. And purchasing means paying money.

                                                                          PROPER PURCHASING 

MATERIALS

* money

* cash

* paper

METHOD

1. Give your money to a partner

2................

3................

4................

NOTE: THIS IS JUST AN EXAMPLE