The Indian side will be departing tomorrow for the tournament, where five other teams -- Australia, New Zealand, Korea, Malaysia and Canada -- will be seen in action.
"We are working on every department of the game, it's not about focusing on only one area. The team has some strength and weaknesses and we have to work on improving the strength as well as find solutions to our weaknesses," the coach said.
India are scheduled to clash with Korea in their first match, to be played on April 5.
"Players are in good shape and working hard. I am working on the 60 minutes that each player spends during the match. Suppose, a player keeps the ball for two minutes in a match, I am working on what he does in the rest of the 58 minutes of the game. Similar to this technique, we are working on other aspects of the game as well," explained van Ass.
Defender Birendra Lakra, meanwhile, said that under the new chief coach the team was learning various new strategies.
"The Sultan Azlan Shah Cup will be a good opportunity for our team and we are in good position now. The new chief coach is working well with us and we are learning new things about the game and various strategies. Our defence is strong and we are confident enough," he said.