Yes, core tools are extremely important in IATF 16949:2016 application. Especially in the new product launch process, production and quality processes, APQP, PPAP, FMEA, SPC, MSA must be applied for IATF 16949:2016 requirements.
The necessity of these applications is specified in IATF 16949: 2016 standard clauses 8.1,8.3,8.5,8.6,8.7,188.8.131.52 and customer-specific requirements. Especially according to OEM customer-specific requirements, while giving PPAP for a new project, there must be evidence of core tools in the PPAP file. At the same time, the IATF standard is a technical standard and an important purpose is the reduction of scrap, waste, and ensuring continuous improvement. Achieving this goal cannot be achieved without applying Core tools.