Finally, it is vital to adapt to a schedule that suits one’s psychological pattern. It can be hard to predict how long some projects will take in engineering. Some tasks not only require more time but also need to be pre-allocated spare time. Chang (2010) suggests that scheduling an uninterruptable time to concentrate on taxing tasks can help save time (p. 171). Hence, before undertaking any task, engineers need to identify the most appropriate time to do them.