Research is a constant throughout the invention development process.
Some of these costs would include materials, labor and packaging. You will have to determine what someone would pay as a purchase price for your product. All of this requires constant research.
Although initial research may indicate that your invention may have the potential to be a profitable commercial success, it's important to realize that invention development can take months, if not years, to complete and that much can change during that period of time.
So while you're focused on your invention, new materials can emerge, new technologies can arise, new patents can be issued, and economic, political or demographic factors could change, which may potentially effect what you're doing with your invention.
Research continues throughout the invention development process because new information may help you, or it could possibily interfere with your success.
Information
Many inventors "believe" they know what the market wants but the reality is often different. Short of having a long list of existing satisfied buying customers, everything is an assumption when it comes to your invention.
But these assumptions can be more plausible if you have conducted consumer surveys, or have polled manufacturers and distributors for information. This can provide details about your pricing, design and development costs.
You may discover a manufacturing method or material that will have a major impact upon your design. Sourcing the cost and availability of workable components can be critical.
You don't want to develop your invention with components that are to be discontinued or subject to escalating costs or long delays in availability.
Options
Only through research can you determine which options are best suited for your invention. Let's say you intend on licensing the manufacturing of your invention. What kind of manufacturing facilities should the manufacture have for your invention?
What kinds of products should they be making? Do they have engineering, design and refinement capabilities? Do they have a successful track record?
Your should also identify government regulations such as hazard, safety, health, environmental, or other regulations that could effect your invention.
There may be approval processes or liability issues that could limit your expectations for success.
