The publications listed below provide useful information, frameworks and techniques

• Business Analysis (second edition), by Debra Paul and Donald Yeates (eds.) (BCS)
  (ISBN 9781906124618)
• Business Analysis Techniques: 72 Essential Tools for Success, by James Cadle, Debra Paul and Paul Turner (BCS)
  (ISBN 190612423X)
• Exploring Corporate Strategy, by Gerry Johnson and Kevan Scholes (Prentice Hall)
  (ISBN 0130807397)
• Soft Systems Methodology in Action, by Peter Checkland and Jim Scholes (Wiley)
  (ISBN 0471986054)
• Practical Soft Systems Analysis, by David Patching (Pearson Education)
  (ISBN 0273032372)
• Systems Thinking, Systems Practice, by Peter Checkland (Wiley)
  (ISBN 0471279110)
• Reengineering the Corporation: A Manifesto for Business Revolution, by Michael Hammer and James Champy (Nicholas Brealey)
  (ISBN 1857880560)
• Benefits Management: Delivering Value from IS and IT Investments, by John Ward and Elizabeth Daniels (Wiley)
  (ISBN 047009463-X)