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Which Ones?

I'm checking if a blockchain is applicable to our project.

In our requirement, a supplier and a buyer get into a work agreement. Later, supplier could claim that they have delivered according to the contract. But buyer could say that the delivery did not meet the quality norms as per the agreement.

I guess such situations are taken to court if big money is involved. Instead, can a technical solution such as blockchain resolve such issues? How can a blockchain verify if the quality of the delivered goods or work meets the terms in a smart contract? If not, what good can we expect from a smart contract and blockchain for this context?

Thanks!

I have a comments section for my web site. But I didn't setup a signup or email validation for posting comments.

Now the issue is, when people ask questions I would like to answer as the site admin, but what if someone else also posts a comment using my username?

The strategy I'm thinking:

If someone tries to post with the site admin username, the code rejects it saying that the username is reserved. Site admin would add a comment using a username which is actually a password. The code checks the username, and if matches this password, then it uses a standard site admin name for the comment.

But it may be difficlut to check for slight variations of the admin username. Is there any library which can test if some word or phrase is too close to a given word?

1. What do applications require in a Platform? 2. Which of those requirements are met by a blockchain?

I don't want to go by the hype being created by the software biggies, bank consortiums or some optimists who go to the extent of saying that blockchain solved all of the remaining unsolved problems in computer science.

I can see that the "XXX-as-a-service" guys just want to be in a position to say "YES", when banks come back to them asking "Do you do blockchain thingy"?. And consortium members don't want to miss out the blockchain party. They don't want to be using old technology if their competitor is going to use the latest stuff and boast about it too. They also want to reduce their costs, may be - but not if everyone else can also do that.

I do agree that blockchain did solve some problems in a very natural way. But everyone seems to be very busy with creating more hype without understanding the fundamental goals and purpose, the blockchain is designed to serve. Just because something is extremely good at something, can we use it just for everything?

Security?? Which parts of it? Can banks do away with linking user info with their accounts or wallets?

Scalability?? What's new?

What are we missing in the existing Platforms to build an application, that is now suddenly available in a blockchain?

Am I missing something?

I hear that all biggies (MS, IBM, Amazon etc) are jumping in with their own BaaS offerings. But I'm puzzled - if these providers each maintain their own blockchain, how can a transaction involving entities which exist in different blockchains, succeed?