The process of procurement of raw materials from different sources are: 

(i) Identifying Raw Material Requirements: The first step is to identify the specifications or requirements that your raw materials need to meet. These specifications may be based on industry standards, customer expectations, regulatory compliance, or your own quality criteria.

(ii) Supplier Identification and Selection: Once raw material requirements are identified, the next step is to identify potential suppliers. This may involve researching suppliers through online directories, trade shows, or industry contacts. Suppliers are evaluated based on factors such as quality, price, reliability, and delivery capabilities. 

(iii) Request for Quotation (RFQ): Request for quote (RFQ) is a process wherein an enterprise asks a set of potential suppliers or service providers to submit their price quotations and stand a chance to supply or provide goods or services.

(iv) Purchase Order (PO) Issuance: The PO includes details such as the quantity, specifications, delivery date, and payment terms. It serves as a legal contract between the buyer and the supplier

(v) Supplier Performance Evaluation: Supplier evaluation is a continuous process for procurement departments and is also a pre-qualification step in the process of purchasing. According to Half and Ellegaard (2011), supplier evaluation is "the process of quantifying the efficiency and effectiveness of supplier action."