# SmartFACT Purchasing > Collect purchase requests, approve purchase orders, send them to suppliers and track what is still to arrive. Explore an invited trial for one site. Invited trials are arranged individually. Scope, dates and terms are agreed before access, with no self-service sign-up or public price. ## Pages - [SmartFACT Purchasing | Purchasing software for manufacturers](https://purchasing.smartfact.ai/): Collect purchase requests, approve purchase orders, send them to suppliers and track what is still to arrive. Explore an invited trial for one site. - [SmartFACT Purchasing service guide](https://purchasing.smartfact.ai/docs): Explore the workflow, the inputs it needs and how an invited trial is arranged. - [SmartFACT Purchasing privacy notice](https://purchasing.smartfact.ai/privacy): How Obsidian Black Ltd handles your enquiry and analytics choice. - [Purchase order approval workflow: who approves, and when](https://purchasing.smartfact.ai/purchase-order-approval-workflow): A purchase order approval workflow is the set of checks an order passes before it goes to the supplier: who approves it, which limits apply and what is recorded. - [How to track on-order stock](https://purchasing.smartfact.ai/track-on-order-stock): On-order stock is the quantity you have committed to buy but have not yet received. - [How to send a purchase order to a supplier](https://purchasing.smartfact.ai/send-a-purchase-order-to-a-supplier): Sending a purchase order means giving the supplier a fixed copy of the approved order by a channel they accept, then recording their response. - [How to track open purchase orders](https://purchasing.smartfact.ai/track-open-purchase-orders): Tracking open purchase orders means following what was ordered, what has arrived and what remains outstanding on each line. - [Purchase requisition vs purchase order: what’s the difference?](https://purchasing.smartfact.ai/purchase-requisition-vs-purchase-order): A purchase requisition is an internal request to buy something; a purchase order is the approved instruction communicated to the supplier. - [How SmartFACT Purchasing works](https://purchasing.smartfact.ai/docs/how-it-works): From a purchase request to an approved order, supplier communication and a recorded delivery. - [Start an invited Purchasing trial](https://purchasing.smartfact.ai/docs/getting-started): Agree one site, supplier catalogue, approval policy and practice before live purchasing. - [How ordering rules and approval work](https://purchasing.smartfact.ai/docs/ordering-rules-and-approval): Describe rules, review their effect and apply approved supplier, quantity and approval choices consistently. ## Discovery - [Full text](https://purchasing.smartfact.ai/llms-full.txt) - [Sitemap](https://purchasing.smartfact.ai/sitemap.xml)