I am in the early stages of establishing my QMS and need some advice/expertise. As background, I own and operate a very small job shop that provides foundry (we have 3 in-house casting methods) and cnc machining services (primarily limited to finish machining of our castings). We are a 4-person operation which means that everyone wears multiple hats, no one is overhead. We started in 2010 by marketing ourselves as a supplier of complete-to-print rapid prototypes but intentionally shifted our focus to high-precision, short-run production components a few years ago. We build to our customer's spec/print; we do not have our own product. We are extremely customer-focused and provide excellent service; I have issued exactly 2 RMAs in 6 years and over 170 jobs completed (internal yield and efficiency is a different story but still quite good). My goal in adopting an ISO QMS is to formally develop the processes and controls that will allow us to scale and improve efficiency; I fully recognize that, as/if my business grows, not every person will be a "key" person with the same aptitude, dedication or ambition as myself or my existing employees. I must also acknowledge that I'm finding ISO certification (at a minimum) with some AS9100 flowdown requirements are necessary for me to win new customers who have low-volume production components that are well-suited for my casting processes. For a variety of reasons, I would like to implement my QMS for my casting services only, to specifically not include CNC machining in it. The main reasons for this are: 1) focus and ease of implementing the QMS 2) the metrology requirements for inspecting castings is far, far more limited and easy to maintain. I have several Tier 2 customer's that have approved me for prototype casting work, that would also give me production casting work if I become ISO certified. They represent the short-term growth plan. That said, I do want to become certified for machining as well, just not day 1. However, and this is critical, I must continue to supply CNC machining services because approximately 70% of my recurring revenue is from producing 6 parts to 3 key customers, and these require finish machining. Frankly, I suspect that many Tier 2 companies will have no problem giving me cnc machining work also, even if it isn't part of my QMS, as long as I can present ISO certs for my core casting business. Now that I have written this novel, can I become ISO certified for my casting work only? My machining area is tucked into a corner of my shop floor, but it is still open to the rest of the shop. If it matters, it wouldn't be too difficult to section off the machine shop and its related inspection equipment with partions (my ceilings are too high to easily wall it off). If that isn't enough, can I establish a separate LLC for machining services, that resides within my building, that my current company can sub-contract machining to? Thank you in advance for your consideration.