AshToolbox Supply Chain Inventory & Operations Suite

Privacy-First Operations Research Suite • 100% Client-Side

Supply Chain & Inventory Optimization Suite

Enterprise-grade inventory lot sizing, stochastic safety stock buffering, multi-criteria ABC-XYZ segmentation, multi-echelon Bullwhip dynamics, and landed cost analytics.

✓ 100% In-Browser Privacy ✓ Textbook Verified (Silver, Pyke, Nahmias) ✓ Web Worker Multithreading

🛡️

Browser-Native Privacy Guarantee

Your inventory logs, SKU records, supplier prices, and freight figures never leave your device. All calculations, simulations, and charts are processed 100% locally.

How the 5 Tools Connect

From SKU segmentation to supplier landed cost, our client-side state bus lets you pass results seamlessly across tools.

PHASE 1

ABC-XYZ Matrix

Classify SKUs by value & volatility

➔ Demand & CV

PHASE 2

Safety Stock & ROP

Calculate buffer stock & service level

➔ Buffer (SS)

PHASE 3

EOQ & EPQ Engine

Determine optimal lot size $Q^*$

➔ Batch Size ($Q^*$)

PHASE 4

Landed Cost

Allocate freight, tariffs & pipeline holding

➔ Unit Landed Cost

PHASE 5

Bullwhip Simulator

Stress-test chain against order amplification

➔ Chen Bound Ratio

Supply Chain Engineering Workbenches 5 flagship engines

Intermediate ~7 min read

Economic Order Quantity (EOQ & EPQ) Engine

Calculate optimal lot sizes, production batch runs, planned backorders, and all-units/incremental price breaks with robustness analysis.

Formula: Q^* = \sqrt{\frac{2DS}{H(1 - D/P)}}

Launch Workbench →

Advanced ~8 min read

Safety Stock & Reorder Point (ROP) Optimizer

Statistically buffer against demand and lead-time variability using normal, loss integral (fill rate), and non-normal intermittent models.

Formula: SS = z \sqrt{L \sigma_D^2 + D^2 \sigma_L^2}

Launch Workbench →

Beginner ~6 min read

ABC-XYZ Multi-Criteria Inventory Matrix

Stratify inventory by annual consumption value (80/15/5 Pareto) and demand predictability (CV thresholds) into a 9-box operational matrix.

Formula: CV = \frac{\sigma_D}{\mu_D}, \quad \text{Pareto 80/15/5}

Launch Workbench →

Advanced ~9 min read

Bullwhip Effect Multi-Echelon Simulator

Simulate demand amplification upstream across Retailer, Wholesaler, Distributor, and Manufacturer with Chen et al. analytical lower bounds.

Formula: \frac{\text{Var}(Orders)}{\text{Var}(Demand)} \ge 1 + \frac{2L}{p} + \frac{2L^2}{p^2}

Launch Workbench →

Intermediate ~8 min read

Total Landed Cost & Incoterms Calculator

Calculate comprehensive per-unit landed costs including freight, customs tariffs, port handling, and in-transit inventory carrying costs.

Formula: \text{Landed Cost} = FOB + Freight + Insurance + Duty + Handling + Pipeline Holding

Launch Workbench →

Formula Reference Library

Comprehensive catalog of EOQ, safety stock, normal loss integral, and Bullwhip equations with mathematical proofs.

Supply Chain Glossary

A to Z dictionary of inventory theory, Incoterms 2020 definitions, lead-time metrics, and logistics terminology.

Validation & Golden Vectors

Detailed unit-test verification reports matching Nahmias, Silver-Pyke-Peterson, and Chen et al. published benchmarks.