Even if the need to change course or cease action is recognized, communication speed, policies, and business politics can be hindrances. A larger organization, especially one with a spread of subgroups, has to communicate the argument and decision to go against previous actions across the appropriate levels. If this communication does not occur in a timely manner or is blocked, the final decision may not be made and acted upon. A decision that goes against existing rules and processes may also reach resistance even with support from those within the organization. Individuals and groups that are directly employed due to a project, have financial stake in it may provide enough opposition to prevent changes from being made as well. They feel personally responsible for the parts they've worked on and can also feel that they too are being replaced or terminated. Escalation of commitment can then occur in any of these situations. External groups can play an even larger part in escalating commitment if their power is greater than that of the group taking action and they use that power to directly lead and influence.