Once you have identified the use case and also specified the strategic details of using blockchain in your solution, the next step you need to do is to determine the consensus mechanism more suited to your use case, you need to choose a consensus mechanism as per your use case requirement. For example, if you are going for a voting application, then you might use delegated proof of stake or if you are going for data storage of health records, then proof of work algorithm might be more suited. Depending upon your requirement and problem at hand. You need to devise consensus for validation and updation of blockchain ledger. There are many consensus mechanisms available in the market. But make sure that your chosen consensus mechanism is most suited for the use case.

After identifying consensus mechanism, you need to remind the blockchain platform or project which is most desired for your use case.