The success of the 11th Malaysia Plan hinges on political stability, which could determine if Malaysia can get the investments required to reach Vision 2020 targets, economists say.

Prime Minister Najib Abdul Razak will table the plan in Parliament tomorrow, amid increasing calls for him to resign.

"The key risk for the 11MP is whether, from the political perspective, there is sufficient stability to sustain investor confidence," economist Yeah Kim Leng said.