The other contributors have provided a lot of good information.
In my experience, a really good SWOT analysis is a critcal bit to any significant expansion and business plan development. After all, the research that is involved means one needs to look both within and without the organization. Both aspects must be considered.
Internal may include:
Current manufacturing/service ability
Internal costs and overhead
Start-up costs for the new product/service/offering/etc.
Estimated continuing costs over some period of time
Cost-benefit ratio analysis
Skills levels in-house
Skills levels needed
If new facilities and/or skills are needed, then estimated time and cost to obtain them
External may include:
Exisitng competitors for the product/service, detailed by market region
Price
Legal issues
Trade restrictions (e.g. can't ship high tech stuff to Cuba)
Cost/payback ratio, based on market penetration
Patent/copyright issues
Known barriers to entry
Certifications needed (e.g. ER report to sell construction materials in some juristions), time/effort/cost/source needed to get the certifications
There are other considerations also, based on the intended product/service, the market, and similar considerations. This is therefore only a common list of considerations.
As one other contributor has noted, specific examples are often propriatory, so sharing of examples may get folks (including me for the ones I have done) in trouble.
I hope this helps.
Hershal