In Jarvis' absence new signings such as Morgan Amalfitano and Diafra Sakho have impressed in their brief time at the Club.
"The team have been doing extremely well so you can't expect to go straight back into the team. I'm going to have to keep working hard in training and if I get an opportunity I need to take it.
"Competition for places is very important. It's important to have good strength in depth to help us push up the league."
Jarvis is delighted with the attacking style of football the Hammers have displayed in 2014/15.
"I think everyone has noticed the difference. We're playing more attacking football, creating more chances and shooting more. The results have been good but I also think we can still improve.
"We want to improve year on year which means getting into the top ten and then pushing for a European place. We all want to do the best that we can and the move to the new stadium will help with that."