Urgent! This paper discusses and compares four basic modes of supply chain.

1, vote;

2. Network development;

3. On-site development;

4. Retail purchase.

1, vote;

Advantages: It is best to buy in bulk. He can make the price transparent, and after the purchase contract is issued, the profit for the product is relatively considerable.

Disadvantages: it is impossible to batch, or the quantity is unstable, the voting cost is not worth the loss, and it is easy to lose suppliers;

2. Network development;

Advantages: fast speed, can solve urgent needs;

Disadvantages: strong falsehood and uncontrollable.

3. On-site development;

Advantages: the delivery time, quality and communication speed are fast and relatively stable;

Disadvantages: weak plasticity and insufficient technical ability;

4. Retail purchase:

Advantages: quick response, quick communication and short delivery time;

Disadvantages: the quality is relatively unpredictable and the price is high!