Duration estimation

I think that a small manufacturing enterprise with up to 20 employees can develop implement and request a certification audit in about 6 to 9 months. So, just for developing the system I believe that 6 months are enough.

The following material will provide you more information about implementing a quality management system:
Should you use a gap analysis in your ISO 9001 implementation? - https://advisera.com/9001academy/17/use-gap-analysis-iso-9001-implementation/
Free ISO 9001:2015 Gap Analysis Tool - https://advisera.com/9001academy/iso-9001-gap-analysis-tool/
ISO 9001 Implementation Duration Calculator - https://advisera.com/9001academy/iso-9001-duration-calculator/
ISO 9001 Implementation diagram - https://info.advisera.com/9001academy/free-download/iso-9001-implementation-diagram
Free webinar – Overview of ISO 9001 implementation steps - https://advisera.com/9001academy/webinar/overview-of-iso-9001-implementation-steps-free-webinar-on-demand/
- Enroll for free course - ISO 9001:2015 Foundations Course - https://advisera.com/training/iso-9001-foundations-course/
- book – Discover ISO 9001:2015 Through Practical Examples – https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/
Perhaps a documentation tool kit could help slash developing time - ISO 9001:2015 Documentation Toolkit - https://advisera.com/9001academy/iso-9001-documentation-toolkit/