Is it true planning without controlling is useless and why?

Yes, planning without controlling can be considered ineffective because plans need to be monitored and adjusted based on actual performance and changing conditions. Controlling ensures that the organization stays on track to achieve its goals by comparing real outcomes to the planned objectives. Without this feedback loop, plans may become obsolete or misaligned with reality, leading to wasted resources and missed opportunities. Thus, effective management requires both planning and controlling to ensure success.