Provide a critical discussion on the purchasing process. Use examples related to the case study to substantiate your answer. Include the following in your discussion:

$-$ Needs Analysis

$-$ Purchase Requisition to Purchase Order

$-$ Purchase Order Review and Approval

$-$ Requests for Proposal

$-$ Contract Negotiation and Approval

$-$ Shipping and Receiving

$-$ Three$-$way Matching

$-$ Invoice Approval and Payment

$-$ Accounting Records Updat