This book can be downloaded.

In the years 2012 to 2015, Roorda developed FFEA, a management method for companies and for government, healthcare and educational institutions and other organizations. The method was updated in 2018.
Information about the method FFEA (Future-Focused Entrepreneurship Assessment) is to be found (in Dutch) at two pages: the main characteristics and the details.

In 2019, the FFEA Extensions were gathered in a book. The cover of it is shown here.
The FFEA Extensions are described in detail on the Extensions page.