1. Environment
Will your part be under extreme heat conditions, next to a heat-generating element or exposed to UV rays?  Will it ever be in hot or cold water?  Will it experience air pressure differentials, come in contact with chemicals or other corrosive materials?  These are all important considerations to make before your part is made.

2. Certifications
Does your part require compliance for food contact or does it need to adhere to UL, NSF or international standards?  Investigating this before-hand is necessary for parts used in food or beverage service, distribution, or for parts used in the medical industry.

3. Tooling
Do you already have the tool in place for this piece, or does it need to be built?  If the tool is currently with another plastics company, did your contract with them include a fee for sending your tool to you? 

4. Color
Have you considered the color and finish for your part?  Plastic materials can be custom color matched to meet your needs.  A wide variety of finishes are also available to complete the look you desire.

5. Shipment & Storage
Whether you are producing a small or large qty, consider just-in-time shipping or how you plan to store your parts.