Apache Hadoop was implemented by the IT team, so it was an in-house implementation.

The solution was implemented through a local vendor team here in Korea.

The product can be deployed with the help of the in-house infra team at my company.

We are the implementers.

I did not use a vendor. I implemented it myself on the cloud with my local machine.

As we were new to the solution, we found we needed some outside assistance to guide us. However, that was for the POC. In the end, I did it myself. 

We used a vendor team who were 9/10.

We implemented this solution.

We have everything on-premises and we did the deployment and maintenance. 
It took four people. We want to increase usage of Hadoop and we are thinking about it very heavily. We're actually in the process of doing it. At the same time, we are integrating things from other systems to Hadoop.

We did have some assistance with the implementation.