Disadvantages of participative management:

There are also disadvantages to participative decision-making. 

Implementation of the tough decisions taken by the  management through participative decision-making sometimes  stalls the entire activities taking the problem from one committee to another committee. 

Group decision-making can be expensive in terms of staff time. A group decision normally takes more time than an executive action. In order to estimate the  full cost of participative decision-making the decision-making time should be  multiplied by the number of people attending the group meeting. 

Lower quality decisions are  also expected through participative decision-making which is not truly effective. If superiors are present or if one member has a dominant personality, the decision of the group may in reality not be a group decision.

This can have a lowering effect  on group morale and of a negative factor for motivation making for feelings of frustration and uselessness.