Sales negotiation
Two companies are negotiating a complex partnership contract and become mired in exchanging their respective versions. A neutral adviser drafts a single draft and has each party work on its amendments. The debate ceases to be "your text versus mine" and becomes "how do we improve this shared text".
On a complex contract that is stalling, propose that a third party draft a single text to be amended, rather than aligning two competing versions.
Ends the war of drafts; each party contributes without losing face.
Requires a credible, neutral third party; without one, the "single text" is suspected of being partial.