complex projects

In chapter 5 of Terry Cooke-Davies' book Aspects of Complexity Stephen Carver and Harvey Maylor apply a flying analogy of four generic types of management to teaching complexity within the project and program environment (Cooke-Davies 2011, p.69-70).  

What do you conclude from Carver's and Maylor's analogy?  And, what on earth do Carver and Maylor mean by structural and dynamic complexity?

In not more than 1,000 words