Draw a process model for the following:

Product Manufacturing Process Pillar to Post" is a company located in Whitewater, Wisconsin, specializing in providing high quality wooden pillars, posts and other wood-based items to homes and businesses. They provide both custom-built items as well as pre-fabricated items, and deliver directly to the customers. As soon as the customer calls, the sales clerk takes the order and payment details and checks for stock availability. This takes about 5 minutes. If the product requested is not in stock (about 25%), it needs to be manufactured before the order handling can continue. To manufacture a product, the required raw materials need to be ordered. Raw materials can be ordered either from supplier 1 or supplier 2, depending on the product. It takes about 15 minutes to order raw materials from the suppliers. Typically about 30% of the raw material orders are obtained from supplier 1. If the product is in stock, then it needs to be retrieved either from the Janesville or Milton warehouses by shipping clerk. Janesville warehouse has about 60% of the items requested. Orders for the Janesville warehouse takes 1 hour to complete, while Milton warehouse takes about 45 minutes. Once the product is picked, the shipping clerk passes this information along to sales clerk by phone, which takes 2 min. The order is then confirmed by sales clerk with the customer (5 min). and then archived for future reference (2 min). On average, about 3 orders arrive every hour. The peak demand is 8 orders every hour, which is usually on Mondays