The document discusses why clients are often accused of changing requirements and timelines. It suggests that clients act this way because project planning is abstract, terminology is confusing, and they lack experience. As a result, clients feel vulnerable, frustrated and not in control. The document argues that communication at all stages is important so clients feel their knowledge is valued and the team is on their side. It concludes by reminding readers that clients are human and advising being friendly, honest and helpful when working with them.