This tool, developed by Bob Williams, is based on the Rand Corporation’s Assumption Based Planning (ABP) method with. Due to most people's inability to work with assumptions, this tool has merged components of ABP and 'force field analysis' approach to overcome this problem.
© Bob Williams
Williams, B., (n.d.). Assumption based planning tool. Retrieved from: http://www.bobwilliams.co.nz/Tools.html