Why is dependability important?
Outside: Doing things in time for customers to receive their goods and services when they are needed is important. If a bus is always late, then they are better off taking a taxi.
Inside: It saves time: FAiling to deliver something on time can cause others to having to arrange special orders etc.
It saves money - Ineffective use of time will add to the cost.
It gives stability - No surprises gives a feeling of safety and comfort. eth.