# The Supply Chain Guys: Honest supply chain judgment from practitioners: DIFOT, forecasting, S\&OP and AI, as they behave in the real world\.

Generated by Yoast SEO v28.2, this is an llms.txt file, meant for consumption by LLMs.

## Pages
- [Frequently Asked Questions \(FAQ\)](https://www.thesupplychainguys.com/faq/)
- [Contact Us](https://www.thesupplychainguys.com/contact/)
- [Blog](https://www.thesupplychainguys.com/blog/)
- [About Us](https://www.thesupplychainguys.com/about/)
- [Straight answers on supply chain metrics, forecasting, and AI](https://www.thesupplychainguys.com/)

## Posts
- [How Teams Game DIFOT \(and How to Design a Score They Can't\)](https://www.thesupplychainguys.com/how-teams-game-difot/): Teams game DIFOT by re\-promising dates, padding lead times, splitting orders, loosening tolerances, growing the exclusion list and measuring at their own dock\. Here is what each tactic hides from the customer, and the audit that catches it\.
- [How to Calculate DIFOT \(With a Worked Example\)](https://www.thesupplychainguys.com/how-to-calculate-difot/): DIFOT is the number of orders delivered in full and on time, divided by total orders, times 100\. Here is the formula, a ten\-order worked example, and the reason your fill rate always looks better than your DIFOT\.
- [Control Tower vs Digital Twin: What the Comparison Articles Won't Tell You](https://www.thesupplychainguys.com/control-tower-vs-digital-twin/): Both tools produce information\. Your supply chain's problem is usually decision rights\. What the control tower vs digital twin comparisons skip, plus the side\-by\-side table\.
- [Forecast Value Add \(FVA\): The Only Forecasting Metric That Settles Arguments](https://www.thesupplychainguys.com/forecast-value-add/): Forecast Value Add scores every stage of your forecast against the stage that fed it, and against a naive baseline\. A worked stairstep, how to run it in a spreadsheet, and how to read a negative result without starting a war with sales\.
- [Section 338 and the 50% Canada Tariff: The Procurement Playbook, Not the Legal Explainer](https://www.thesupplychainguys.com/section-338-canada-tariff-usmca-override/): The 50% Section 338 duty on covered Canadian goods took effect on 22 August 2026, and USMCA origin does not exempt a single line\. What the annexes actually cover, where the duty attaches, and the buy\-forward math\.

## Categories
- [supply chain operations](https://www.thesupplychainguys.com/category/supply-chain-operations/)
- [Demand Planning](https://www.thesupplychainguys.com/category/demand-planning/)
- [Supply Chain Learning](https://www.thesupplychainguys.com/category/supply-chain-learning/)

## Tags
- [Supply Chain](https://www.thesupplychainguys.com/tag/supply-chain/)
- [Forecasting](https://www.thesupplychainguys.com/tag/forecasting/)
- [DIFOT](https://www.thesupplychainguys.com/tag/difot/)
- [Demand Forecasting](https://www.thesupplychainguys.com/tag/demand-forecasting/)
- [Forecast Bias](https://www.thesupplychainguys.com/tag/forecast-bias/)

## Optional
- [Sitemap index](https://www.thesupplychainguys.com/sitemap_index.xml)