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Forecasting Blog

Demand Forecasting, Sales Planning, Big Data Analytics & IBP

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Flash News

planning strategy, ibp, scenario planning, demand planning, plm mapping

Planning Strategy for New Products in SAP IBP

true-demand

Major Roadblocks to Capturing True Demand

supply-chain-challenges-2023-valtitude

Global Supply Chain Challenges 2023 – Preparing For The Storm

How Zillow’s Home-Buying Business Blew Up

Managing Sales Order Deadlocks

How do you calculate True demand?

Suez Canal Blockage – Impact on Trade & Supply Chains

Some CPFR terminology in Demand Planning

If You Were Heading Up A Supply Chain Org, What Will be your Overarching Objective And Why?

As Nasdaq Soars, Are We at the Start of the Great Bull market for the Roaring 20s?

Wednesday, May 20, 2026

Author: Dr. Chockalingam

Dr. Mark Chockalingam is the founder and President of Demand Planning LLC, a Business Process and Strategy Consultancy helping clients across industries: Pharmaceuticals, Consumer Products, Chemicals and Fashion Apparel. His specialty consulting areas include Sales forecasting, Supply Chain Analytics, and Sales and Operations Planning. He has conducted numerous training and strategy facilitation workshops for a variety of clients in the US and abroad. Mark has worked with a variety of companies from the Fortune 500 such as Wyeth, Miller SAB, FMC, Teva to the small and medium size companies such as Au Bon pain, Multy Industries, Ticona, a divison of Celanese AG. With significant expertise in business forecasting and modeling, he is a frequent speaker at major supply chain events on topics ranging from demand management to sales and operations planning. Prior to establishing his consulting practice, Mark has worked with manufacturing companies in important supply chain positions. Mark was Director of Market Analysis and Demand Planning for the Gillette Company, now part of Proctor and Gamble. Before Gillette, Mark led the Suncare, Footcare and OTC forecasting processes for Schering-Plough Consumer HealthCare in Memphis. Mark has a Ph. D. in Finance from Arizona State University, an MBA from the University of Toledo and is a member of the Institute of Chartered Accountants of India.
Forecasting Metrics and Diagnostics

Can We Use Multiple Linear Regressions to Model Sales Promotions?

Dr. Chockalingam July 29, 2009

The simplest approach to model promotions is through interventions. This is also called event modeling in the literature. We collect a list of events and classify into types of events … Read More

demand planningEvent modelingForecastingforecastproModelingpromotional forecastingworkshops Comment on Can We Use Multiple Linear Regressions to Model Sales Promotions?
Inventory Optimization

Inventory Optimization vs. Days on hand

Dr. Chockalingam July 20, 2009

Why is it important to learn new techniques than banking on century old DOH measure? The Days of Supply is a thumb rule calculation used to manage inventory during the … Read More

Forecast Errorinventory managementinventory optimizationsafety stockSupply network optimization 3 Comments on Inventory Optimization vs. Days on hand
Forecasting Metrics and Diagnostics

Model Diagnostic – R Squared or MAPE?

Dr. Chockalingam July 19, 2009

We have now settled that MAPE or Mean Absolute Percent Error is the measure for forecast performance for a planner/Division at the end of the month.  It is more popularly … Read More

Comment on Model Diagnostic – R Squared or MAPE?
Forecasting Metrics and Diagnostics

Is MAPE controversial?

Dr. Chockalingam July 10, 2009

MAPE = Mean Absolute Percent Error.  This is the common error measure used by the Supply Chain profession.  Demand Planners and Demand Forecasters spread across the manufacturing sector use MAPE … Read More

BiasForecast AccuracyForecast ErrorMAPESales Targets 1 Comment on Is MAPE controversial?
Forecasting Metrics and Diagnostics

The Mystery of Moving Averages

Dr. Chockalingam July 10, 2009

A user in an APO forum lamented: “I am trying to use the Moving Average option in APO DP but I get a static forecast that remains constant for all the future … Read More

Constant ForecastsForecastingModelingMoving AveragesRobustness Comment on The Mystery of Moving Averages
Aggregate Planning

Hello Demand Planners!

Dr. Chockalingam July 9, 2009

Welcome to the forecasting blog! These are collection of thoughts on forecasting, demand planning, Sales and Operations planning and corporate strategy!  Please contribute your thoughts and comments to enhance the … Read More

1 Comment on Hello Demand Planners!

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