What factors can cause controls that are established and implemented for a prolonged period of lose their effectiveness?

Controls can lose their effectiveness over time due to changes in the operational environment, such as new technology, evolving regulations, or shifts in market conditions. Additionally, complacency among employees can lead to a decrease in adherence to established procedures. Continuous improvement is also crucial; if controls are not regularly reviewed and updated, they may become outdated and fail to address emerging risks. Lastly, insufficient training or communication about the controls can result in misunderstandings and lapses in execution.