TABLE OF CONTENTS Every batch plant has recipes for the products it produces. Every product recipe consists of a header, equipment requirements, formula and procedures. For example, let us consider a recipe of a cake mix. The recipe header identifies the product as, say chocolate cake. The equipment requirements identify the required processing equipment for making the cake. For the cake mix, the equipment requirements are detailed on the pack, say a large bowl, a mixer, a cake pan, etc. The formula defines the ingredients, such as 1 pack of chocolate cake mix, 2 eggs, 150 ml water, 50 ml edible oil, etc. The procedure defines the processing actions and sequence of execution. For making chocolate cake, first pre-heat the oven to 350 C, mix eggs with water and oil, add cake mix and blend until smooth, pour into cake pan and bake in oven for 45 min.
Every product produced in a batch plant has a recipe consisting of similar components. For some products, these components may not be obvious, but they do exist. For example, a recipe may be on a piece of paper that the operator uses to produce the batch. The recipe header and formula are defined on the paper. The equipment requirements and procedure is implied, e.g. blend all ingredients together in a blender. In a more automated process that has a control system, the formula values and procedure may be fixed in that control system. In some plants, the products to be produced have the...
