What does automotive quality management software need to do?
It has to hold the core tools IATF 16949 relies on, which are APQP, PPAP, FMEA, SPC and MSA, and keep them linked. When a design, process or supplier changes, the FMEA, control plan, gauges and customer approvals that depend on it must update together, with evidence an OEM auditor can follow.
Most suppliers run the core tools in separate spreadsheets. They work fine on their own. The trouble starts when one changes and the others never hear about it, and the auditor finds the gap before you do.