I'm a "resting" freeleance BA. My most successful / high risk project as a BA? The merging of the inward payment processing business systems (located hundreds of miles apart) of the Inland Revenue and the VAT Office when the two UK government departments became HMRC.
I was responsible for almost the entire UK Treasury's cash flow. No headlines, no big media witch-hunt, just a smooth transition from as-is to to-be. Probably one of the largest, most successful projects you never heard about.
Keys to success? Pragmatic use of SSADM and my insistence on including a trade union rep on the project board. This made sure that the workers' personal requirements could be accomodated as far as was possible in the big upheaval that the merger brought about. It also de-risked the project by having the trade unions and staff "on-side".
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