Sometimes, the other department really isn't a bottleneck; the first department just incorrectly thinks it is. For example, decades ago I had a consulting gig

Sometimes, the other department really isn't a bottleneck; the first department just incorrectly thinks it is. For example, decades ago I had a consulting gig to help an enterprise pick an app dev tool. This was during the period in the 1990s that fat-client run-times were clearly the best choice, yet my clients thought that the security folks were (foolishly) insisting on X-terminals instead. My solution was to suggest they get security on the phone. It turns out my client department's belief was false. End of problem.