If you are designing a board that involves soldering discrete wires directly onto the PCB for jumpers or harness integration, is the specific guideline you need. If you are looking for general PCB design rules, you likely need IPC-2221 instead.
IPC-7801 Explained: Reflow Oven Process Control ... - PCBSync Ipc-7801 Pdf
is a standard published by IPC (Association Connecting Electronics Industries) . It provides guidelines for the design, materials, and assembly processes used in Discrete Wire Board Assemblies . If you are designing a board that involves
Because standards can have similar numbers, ensure you do not need one of the following: - PCBSync is a standard published by IPC
As electronics become smaller, denser, and are deployed in harsher environments (think autonomous vehicles and IoT sensors in industrial settings), the "build it and hope it works" strategy is no longer viable.