It takes time to get varied information for better decision making.
When a decision is made, usually an accompanying set of instructions will be formulated to pursue the ideal result. But instructions are usually not set by the decision maker. Rather, it is those who are appointed to oversee the implementation of the decision who need to work out the nitty-gritty details. And it takes time for them to fully understand the rationale behind the decision and to give directions.
Sometimes, it may not be the decision itself, but the instructions or the delay in formulating the instructions that result in a bad outcome.
It takes courage to be decisive: to choose and to trust the right people.