Power/Utilities in SAP is taken care by IS-Utilties. Normally power plant scnerio will not get mapped. As Power i mean output will not be stocked and normally it is connected to state Grid/ central electicity Grid and controlled by load dispatch center (LDC).
Where as cement industry is having Make to stock strategy. it is quite different from power plant.
I can say - MM in Power plant is ok I mean OIl, water & coal can be handled in pipe-line procurement if the supplier is nearby. this is the case in singernari collaries and NTPC coal plant in AP. otherwise coal can be stocked using sap WM (using open bin strategy) and oil in hazardeous material management..
Also plant maintenance is also possible to map in Power plants..once PM notification created by maintenance department..i mean mechanical, electricla and Control and instrumentation mtce department..next is PM order and then it will go for relese and approval teco closure. or if no material is avaialble then it will got for PR- PO- GR- placed in stock or direct issue to PM order/work order- release- teco- closure...etc.
SAP SD also difficult to map because power once generated connected to Grid and cannot be stocked and so availability check and other normal Logistics functions not possible. but billing/invoice/credit functionality possible.. there is no returns management as in case of power..
we can distinguish the coal based on the supplier (foriegn or domestic) using split valauation. i heard in some states even power also based on generation method - good and pure and i mean based on energy factor it can be distinguished..
SAP QM is possible for coal estimation(moisture content, sulphur content etc..& also emission contril CO, CO2, NO etc.. used in pollution control and for boiler water treatment, Dosing etc..also to check Light diesel oil, HFO mixture calaculation and many more applications.
we can say MM application is more - inorder to procure material needed for maintenance of Mill /boiler/pumps/valves etc.. in power plant. normally in power many more rotating equipment availability and due to that preventive maintenance and also break down mtce is critical to avoid dangerous situations..tube/valve/pipe leak..
I can SAP MM & PM & QM - playing major role in consideration of SAP in power plant than SAP PP..
Hope this is very short example,,,if nwe need discuss in details it is time consumable..Also PM is used in Equipment caliberation of sensors/transmitters. i can SAP IS- Device management will have more influence in power plant becxause in power plant more number of temperature/pressure/flow.level sensors /transmitters.gauges will be available and it requires frequent caliberation and mtce because it is installed in steam/Hot water lines/Oil lines etc..
SAP WM is somewhat useful for efficient material handling in power plant but that is not necessary.. we cna maintian he stock @ storage location level i mean IM level and it is also efficient..FICO is more useful in any kind of business..
SAP FICO/MM/PM/QM/IS-Utilties/IS-DM/ with very less involvement of SAP SD. I cna SAP PP Involvement is less..variant config for valves./pumps is important..
Hope this helps..
Regards,