The Baggies head coach took Albion for a warm-weather training camp his native Spain last week to work both on the pitch and off it.
As well as training in a more pleasant climate and working on tactics, Mel revealed he used the chance to get his message across and explain to players how things will change under his regime.
The former Real Betis coach, however, was keen to stress the new rules are more concerned with protocol and logistics than any form of 'code of conduct'.
"It was very good," Mel said of their trip to Jerez. "We created a good atmosphere for the future.
"It was an important week because we established the new rules for work and new concepts for the play in the matches. The players are thinking about all the things from the new coach.
"For me it's important for the players to believe in their coach and the new concepts and play football. The most important thing is hard work in training and on the pitch."
Mel, who has had two mystery novels published, said: "After work, it's their private life. I am not Sherlock Holmes, I'm a football coach. Good performance is more important for me.
"Players and technical staff work together everyday and new rules for breakfast, work on the pitch, for travel et cetera, is normal."
Mel revealed midfielder Claudio Yacob will miss Saturday's Barclays Premier League visit with a hamstring problem sustained against Chelsea in Albion's last match.