The Vietnam Best IT Company Top 15 list is based on overall rating, category ratings and quality of ratings.
If a company has a high overall rating but 1-2 below average category ratings, the company is unlikely to win VBIT.
Similarly, if most reviews of a company have little detail other than "I love this company, this company is great!" the company is unlikely to win VBIT.
We've found that employees who really love a working environment tend to write lots of very specific detail about why they love it.