What is the relationship between S88 and S95?

Level 0, 1, 2, 3 and 4

S95 defines 4 levels in industrial companies.

Level 0, 1 en 2 are the levels of process control. Their objective is the control of equipment, in order to execute production processes that end in one or more products.

Level 3 could be called the level of MES (manufacturing execution system) activities. Level 3 consists of several activities that must be executed to prepare, monitor and complete the production process that is executed at level 0, 1 and 2. For example activities like detailed scheduling, quality managament, maintenance, production tracking, and so on.

The highest level (level 4) could be called the level of ERP (Enterprise Resource Planning) systems. At this level financial and logistic activities are executed. These activities are not directly related to production. For example Long term planning, Marketing and sales, Procurement.

The focus of S88 is level 2. S95 is focused on level 3 and 4.

Hierarchical structuring of industrial companies

S88 defines the Physical model, that structures the Enterprise hierarchically from the highest to the lowest level: Enterprise, Site, Area, Process cell, Unit, Equipment Module and Control module. S88 is especially focused on the level of the Process Cell and the lower levels. S95 is focused on the boundary between the Area and the Site.

S95 is based on S88

S95 is based on the hierarchical structuring of S88 of the physical assets of the industrial company. But S88 focuses on the Process cell and S95 focuses on the Site and the Area. For S95 the levels of the Process cell and Unit are only of interest if it is necessary to exchange information between enterprise and control systems about these levels. It might be necessary for the business logistic system to have information about the process cell, to be able to schedule long term activities in this process cell.

S95 also adopts the S88 terminology. It uses terms like Enterprise, Site, Area, Process cell, and so on, as attributes of the Production Schedule. If you have structured your product information based on S88, it will be easier to use the S95 object models for product information. There are a lot more similarities to be mentioned, which is not strange; a lot of SP95 committee members are also S88 committee members.

In short: It is not strictly necessary to have basic knowledge about S88 is you want to understand S95. But it makes it a lot easier. It will also be less complicated to apply S95 if your company is already using S88. But it is not strictly necessary.

Do you want to know more about S95 or S88?

Contact TWP training & consultancy for more information.