The five functions of supply chain management include the following:

1. Purchasing
The first function of supply chain management is purchasing. In the manufacturing process, raw materials are required to produce goods and products. It is important that these materials are procured and delivered on time so that production can begin. For this to occur, coordination with suppliers and delivery companies will be required to avoid any potential delays. 

2. Operations
Demand planning and forecasting are usually required before materials can be procured, as the demand market will dictate how many units to be produced and how much material is required for production. This function is important in supply chain management as organizations must accurately forecast demand to avoid having too much or too little inventory that will lead to losses in revenue. Therefore, demand planning and forecasting must be tied in with inventory management, production, and shipping to avoid such mistakes. 

3. Logistics
Logistics is the part of supply chain management that coordinates all aspects of planning, purchasing, production, warehousing, and transportation so that the products will reach the end-consumer without any hindrances. It is helpful to have adequate communication between multiple departments so that products can be shipped to customers quickly and at the lowest cost. 

4. Resource Management
Production consumes raw materials, technology, time, and labor. Resource management ensures that the right resources are allocated to the right activities in an optimized manner. This will ensure that an optimized production schedule is created to maximize the efficiency of the operations. When calculating the available capacity, you should consider the capabilities of each resource and determine whether they can perform the work that is scheduled on it. This will ensure that you are not over-promising orders and that your production schedule is feasible and accurate.

5. Information Workflow
Information sharing and distribution is what keeps all of the other functions of supply chain management on track. If the information workflow and communication are poor, it could break apart the entire chain. Many disruptions that arise in supply chains can be prevented by increased visibility and communication. Having a consistent system that is used by all departments will ensure that everyone is working with the same set of data and will prevent miscommunications and time spent updating everyone on new developments.