Wha is the use of algorithm? People use algorithm to explain something to others in order to make other people easy to understand their planning or process running system. Simple map to show the way to certain place also a kind of algorithm form. So algorithm can be called as the clue or flow or the step to reach something or goal.
Process algorithm or process diagram is the order step to reach something, or to get something, like in Industry. The step to produce a certain product need many step to reach the real product. We can't get that product without use the available step, or can't get product faster without use the available step like on the process diagram. In reality the process diagram or process algorithm is not always true, that flow process just a clue and show the current fastest process or current available process or current effective process. The function of algorithm is to show that the available process as their experience, if there are new process algorithm discovery that better than the old one, the process algorithm can be changed.
So on the final step of process diagram then completed with the line back to the beginning to review the available process. If the available process is not good then people can improve with the new one. The changes to make some improvement on the production process always do in order to get highest quality product in order can compete on the market. In all production process is need this back-line-step to improve their product, to improve their service or to improve their system and management. The process on electroplating or the process on anodizing is need this kind of process algorithm to improve the service and product quality.