# ERP Information

> ERP Information (erp-information.com) is a reference site on enterprise resource planning (ERP), manufacturing, production planning, procurement, and supply-chain software. It explains core ERP and MRP concepts, walks through ERP modules and processes, and reviews ERP and industrial business software.

## Core ERP concepts
- [What is ERP?](https://www.erp-information.com/what-is-erp.html): Definition of enterprise resource planning, how ERP systems work, and what they are used for.
- [History of ERP](https://www.erp-information.com/history-of-erp.html): Evolution of ERP from MRP and MRP II to modern cloud ERP.
- [ERP Sales Module](https://www.erp-information.com/erp-sales-module.html): How the sales/order-management module works within an ERP system.
- [ERP Purchasing Module](https://www.erp-information.com/erp-purchasing-module.html): Purchasing and procurement functions inside ERP.
- [ERP Production Planning Module](https://www.erp-information.com/erp-production-planning-module.html): Production planning and scheduling within ERP.

## MRP and production planning
- [Master Production Schedule](https://www.erp-information.com/master-production-schedule.html): What an MPS is and how it drives production and material planning.
- [Manufacturing Resource Planning (MRP II)](https://www.erp-information.com/manufacturing-resource-planning.html): MRP II concepts and how they extend material requirements planning.
- [Gross Requirements](https://www.erp-information.com/gross-requirements.html): Gross vs. net requirements in MRP calculations.
- [Net Requirements](https://www.erp-information.com/net-requirements.html): How net requirements are calculated in MRP.
- [Pegged Requirements](https://www.erp-information.com/pegged-requirements.html): Pegging in MRP and SAP — linking demand to supply.
- [Period Order Quantity](https://www.erp-information.com/period-order-quantity.html): The period-order-quantity lot-sizing method.
- [Part-Period Balancing](https://www.erp-information.com/part-period-balancing.html): The part-period balancing lot-sizing technique.
- [Discrete Manufacturing](https://www.erp-information.com/discrete-manufacturing.html): Discrete manufacturing and how it differs from process manufacturing.

## Capacity and shop-floor planning
- [Rough-Cut Capacity Planning](https://www.erp-information.com/rough-cut-capacity-planning-details): RCCP and how it validates the master production schedule.
- [Work Center](https://www.erp-information.com/work-center.html): What a work center is in manufacturing and ERP routing.
- [Dispatch List](https://www.erp-information.com/dispatch-list.html): The shop-floor dispatch list and its role in scheduling.
- [Output Control](https://www.erp-information.com/output-control.html): Production output control and its purpose.
- [Frozen Zone](https://www.erp-information.com/frozen-zone.html): The frozen zone in production scheduling.
- [Process Sheet](https://www.erp-information.com/process-sheet.html): What a manufacturing process sheet contains.
- [Human Machine Interface](https://www.erp-information.com/human-machine-interface): HMI in industrial automation and manufacturing.
- [Direct Numerical Control](https://www.erp-information.com/direct-numerical-control.html): DNC and how it connects CNC machines.

## Procurement and purchasing
- [Procure-to-Pay (P2P) Cycle](https://www.erp-information.com/procure-to-pay-cycle-p2p-cycle): The full procure-to-pay process, step by step.
- [P2P Cycle in Oracle Apps](https://www.erp-information.com/p2p-cycle-in-oracle-apps): The procure-to-pay cycle as implemented in Oracle Applications.
- [Purchase Requisition](https://www.erp-information.com/purchase-requisition): What a purchase requisition is and how it differs from a purchase order.
- [Purchase Price Variance (PPV)](https://www.erp-information.com/purchase-price-variance-ppv): How PPV is calculated and why it matters.
- [Vendor Rating](https://www.erp-information.com/vendor-rating.html): Methods for rating and evaluating suppliers.

## Logistics and supply chain
- [3PL Software](https://www.erp-information.com/3pl-software): Third-party logistics software and leading 3PL platforms.
- [5PL Logistics](https://www.erp-information.com/5pl-logistics): What fifth-party logistics (5PL) means.
- [Yard Management System](https://www.erp-information.com/yard-management-system): What a YMS does in warehouse and logistics operations.
- [Premium Freight](https://www.erp-information.com/premium-freight.html): Premium freight costs and how to reduce them.
- [Target Inventory Level](https://www.erp-information.com/target-inventory-level.html): Setting target inventory levels for stock control.

## ERP products and reviews
- [Deltek Vantagepoint Review](https://www.erp-information.com/deltek-vantagepoint): Modules, pricing, and pros/cons of Deltek Vantagepoint.
- [E2 Shop System ERP](https://www.erp-information.com/e2-shop-system-erp-details): Overview and details of the E2 Shop System ERP.
- [metasfresh ERP](https://www.erp-information.com/metasfresh-erp): Overview of the open-source metasfresh ERP.
- [Product Data Management](https://www.erp-information.com/product-data-management.html): PDM systems and how they manage product information.
- [Zachman Framework](https://www.erp-information.com/zachman-framework): The Zachman enterprise-architecture framework explained.

## Calculators and tools
- [Temperature Humidity Index (THI) Calculator](https://www.erp-information.com/calculators/temperature-humidity-index-thi-calculator): Calculate the temperature-humidity index.
- [Maximum Retail Price Calculator](https://www.erp-information.com/calculators/maximum-retail-price-calculator): Calculate maximum retail price (MRP).