Right Sized Inventory
Operational Decision Science

One Engine at the Center of an Expanding Stack

RSI began with a patented, cloud-based predictive analytics engine for inventory optimization. Everything built since extends that same science outward, layer by layer, as clients asked for more.

How the Technology Expanded

RSI began with simulation-based Inventory Optimization and has expanded into a broader set of supply-chain decision capabilities. A deep analytics layer now spans those capabilities, using advanced and increasingly agentic tools to uncover patterns, interpret results, and accelerate decision support. Surrounding the technology is RSI practitioner expertise, the human layer that connects analytics to real operating decisions.

RSI EXPERTS STRATEGIC OPERATION SERVICES DEEP ANALYTICS ACROSS EVERY CAPABILITY NETWORKBALANCING PRIORITIZEDPLANNING(PRIO) AIAUTOMATION INVENTORY OPTIMIZATION RSI PATENTED ENGINE
  1. The core
    Inventory Optimization

    Where RSI started and still the foundation: a patented, simulation-based engine that models real demand and lead-time variability at the item × location level.

  2. Capabilities
    Additional operating capabilities

    Network Balancing, Prioritized Planning (PRIO), and AI Automation leverage our core IO capability.  Each extends the core into a decision domain clients asked RSI to help with.

  3. Deep Analytics
    A layer across everything we do

    Advanced and increasingly agentic analysis that works across every capability, reading what goes into the engine and what comes out of it to surface patterns and answer questions faster.

  4. Outer layer
    RSI experts with deep operational experience

    Practitioners who have run planning, inventory, and distribution organizations. They are the primary interface to clients, interpreting the analytics and turning them into operating decisions. Our experts provide ongoing Strategic Operation Services to help ensure great supply chain decisions are repeatable.

The flaw in formulas

Traditional inventory optimization formulas and algorithms create inventory deficiencies or surpluses because they cannot account for the required supply chain variables to accurately determine inventory levels. By not accounting for these critical supply chain variables, these methods essentially do not represent each inventory item’s actual unique variation and constraints.

Our optimization software simulates real-world client environments, predicts optimum inventory levels at an item/location level, and enables our clients to realize better business outcomes by eliminating inventory imbalances and quantifying risk.

These fundamental flaws of formulas result in two dangerous inventory realities that are often present together:

Reality one
Too Much Inventory

which ties up working capital, consumes valuable warehouse space, and drives costly relocation

Reality two
Too Little Inventory

which often results in poor on-time delivery and lost sales/clients along with costly expedites

The RSI Engine

Monte Carlo simulation
Not a black box

Predictive analytics is a powerful technology that can improve an enterprise’s efficiency and profitability. However, despite the obvious benefits, introducing predictive analytics does come with some challenges. One such challenge is the notion that predictive analytics technology represents a “black box” that is difficult to understand and explain.

How the simulation runs

RSI’s patented technology is not based on static formulas or algorithms. We use a Monte Carlo simulation technique to simulate supply chains for any given item in any given location. 

During the simulation process, daily inventory goes up due to anticipated receipts of supply and goes down due to anticipated demand or any other valid consumption of inventory. During the simulation, RSI pays particular attention to two things:

WHAT IT MODELS
Average inventory level

the average on-hand inventory quantity throughout the simulation

Average service level

is this simulated inventory quantity sufficient to meet demand requirements at the desired customer service level?

Real-world inputs

As inventory levels increase or decrease during a simulation, a lot of factors come into play. RSI works with our clients to collect all relevant input parameters that enable our simulations to best reflect real-world behavior of their items in their business environment. It is crucial that these input parameters reflect real-world processes and values in order to properly simulate how inventory is expected to change over time.

RSI’s simulation technology determines the minimum inventory level that has the highest probability of meeting the required service level.

Run at Cloud Scale

AWS cloud computing
2,000
Minimum independent inventory behavior simulations, per item
~10
Real-world factors represented in the model
Minutes
To simulate real-world conditions across an entire supply chain

RSI harnesses the power of AWS cloud computing to simulate real-word conditions in minutes. Our patented technology leverages a probabilistic Monte Carlo model that accurately and correctly represents all real-world factors (there are about 10) affecting actual inventory and service-level behavior. RSI also utilizes statistics that correctly represent demand and supply variability. The model generates a minimum of 2000 independent inventory behavior simulations for your entire supply chain at the individual item level. This quantifies and accounts for any randomness, intermittency, uncertainty and variance in the determination of optimal inventory levels.

We have found that processing a minimum of 2,000 Monte-Carlo-style iterative simulations best drives a high-confidence statistical probability that the RSI target inventory level will meet the required service level for each item at each location.

See the engine run on your own data.

Start with a Supply Chain Assessment. You scope what gets evaluated.

Schedule a Supply Chain Assessment