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Inventory Management for Retail — Stochastic Demand 📈

Implement inventory management rules based on a periodic review policy to reduce the number of stores replenishments

For most retailers, inventory management systems take a fixed, rule-based approach to forecast and replenishment orders management.

The objective is to build a replenishment policy that will minimize ordering, holding and shortage costs.

In a previous article, we have built a simulation model based on a continuous review inventory policy, assuming a normal distribution of the demand.

However, this kind of policy can be inefficient when you handle a large portfolio of items that may have different replenishment cycle lengths.

Article

In this Article, we will improve this model and implement a periodic review policy with Python to limit the number of replenishments.

Problem Statement

As an Inventory Manager of a mid-size retail chain, you are in charge of setting the replenishment quantity in the ERP. Because your warehouse operational manager is complaining about the orders frequencies, you start to challenge the replenishment rules implemented in the ERP, especially for the fast runners. Previously we have implemented several inventory rules based on continuous review policies.

Question

What would be the number of replenishments if you have 2,500 SKUs?

Data set

This analysis will be based on Dummy Data shared in this folder.

Code

In this repository code you will find all the code used to explain the concepts presented in the article.

About me 🤓

Senior Supply Chain Engineer with an international experience working on Logistics and Transportation operations.
Have a look at my portfolio: Data Science for Supply Chain Portfolio
Data Science for Warehousing📦, Transportation 🚚 and Demand Forecasting 📈