I sat in on a World Economic Forum working group for blockchain based supply chains, and surprisingly little time was spent discussing the technology. We largely deliberated on governance frameworks for blockchain consortiums. When something goes wrong, such as accidental transactions, who is liable and is some entity capable of rolling them back? The beauty of paper and legal contracts is that humans get to act as sanity checks against mishaps. We would never expect a consumer to pay $1 million for a car because they fat-fingered a decimal point in the wrong place. Blockchains by their nature have no such do-over capabilities, a source of their strength, but sometimes you just need to fix a glitch. These questions and more come down to governance. Do consortium members vote directly on rule changes like a fully-democratic DAO (Distributed Autonomous Organization), or does management of the smart contracts fall on a subset of representatives?

The second question to ask is: Is there a benefit for a distributed network topology (assuming question one is true)? This is a pretty technical way of saying, is there enough value in distributing your data across the world to offset the cost of doing so? Sometimes there is. For example, say you wish to create a multi-nation distributed ledger for encoding customs data, the ability for each country to manage their own pieces of the blockchain on local soil is a better proposition for small countries than hosting their data in an overseas cloud provider.

These two simple questions (“Do I need a trusted third party?” And, “Is DLT a useful topology?”) go a long way to filtering out poor use-cases for blockchain, and lets you focus on the scenarios where blockchain might be a good fit. Just don’t start with, “I need blockchain.”