'Root Causes of Troubled Projects' (Computing, 2001), 'Troubled IT Projects: prevention and turnaround', Chap. 2, pp. 13-22, DOI: 10.1049/PBPC003E_ch2
IET Digital Library, https://digital-library.theiet.org/;jsessionid=bgin0ohslg7ms.x-iet-live-01content/books/10.1049/pbpc003e_ch2