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SAP Enterprise Inventory and Service-Level Optimization

EIS Support Documents


This page is an index of EIS topics to help customers, consultants and supply chain experts learn more about SAP Enterprise Inventory and Service Level Optimization.  These presentation files are each on a unique topic.  These are part of our customer support dialog from the last few years including years prior to the SAP acquisition of SmartOps.  If you are a customer with a need for support, click here for help at  To create an incident (note you have to register and search for SCM-EIS), click here for the SAP Service Marketplace link.  But browse through this material first to see if you can find the answer to your questions.

Click here to view the EIS WIKI Support page with a great deal of helpful information and new updates regularly.

We also have a page of our EIS Educational material used to training new customers prior to implementation.

SUPPORT Documents

EIS Shifted vs. Unshifted Safety Stock

This brief document describes the difference between the way the safety stock is calculated compared to the unshifted safety stock.  There is also an explanation about when it makes sense to use unshifted safety stock.

End Horizon Explanation

Explanation of the different time horizons in EIS, the Data Horizon, End Horizon and Analysis Horizon.

Manufacturing Run Cycles

Plants may not manufacture a particular SKU every week so production frequency may be lower than period between review because of changeover, setup costs and batch production. Production constraints will impact safety stock levels. This presentation describes modeling alternatives.

Impact of Period Between Review (PBR) on Safety Stock

Impact of PBR on Safety Stock with different forecast error (CV) and service level targets.

Effect of Batch Size on Safety Stock Calculations

This presentation describes the impact of batch size on the inventory and safety stock calculations in SAP Enterprise Inventory and Service-Level Optimization (EIS).

Demand Variability Pooling

Often time a single stocking node will supply multiple downstream customer facing nodes. Holding a single inventory allow for risk pooling of the variability of the demand and reduce the total inventory. This document presents the impact of batch size on risk pooling factor.

Handling Forecast Bias

In Enterprise Inventory and Service-Level Optimization there are three levers to adjust inventory targets for forecast bias: 1. Adjust Forecast Error CV 2. Adjust Future Forecasts 3. Adjust Future Safety Stock Requirements   The attached document presents the details, use cases and parameter settings.

Safety Stock Period vs. Unit Supply Levels

Using safety stock units is always the most precise method especially for time-varying demand. Using safety stock periods of supply for static demand is more intuitive for planners and requires less frequent MIPO refreshes. This file shows how EIS converts safety stock units into safety stock periods with some examples.

Calculating Average Cycle Stock

Based on the definition, average cycle stock is about half-a-period's demand less the target cycle stock.  This presentation shows how average cycle stock is calculated when the lead time is less than one.

Lead Time Variability and Order Crossover

This presentation explores shortages due to lead time variability, the impact on safety stock requirements and the order crossover effect.  The order crossover effect occurs when orders are not received in the same sequence that they are placed.

If these documents and the Support WIKI do not answer your question, follow these instructions to create an incident for EIS Support with SAP.  Included are  - Steps to Logging an Incident - The Incident Wizard; Choosing a System - Components for EIS, and - FAQs, all complete with embedded links. There are only 6 slides so this is the place to start if you need to log an incident with SAP about EIS.

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