"If you can't measure it, you can't manage it". Peter Drucker. or;"If you can't measure it, you can't improve it." Lord Kelvin
Peter Drucker and Lord Kelvin provide us with a clue to where to start and it is not with fancy BI tools. Step 1 is to understand your organisation and how it adds value. Step 2 is to provide accurate, or perhaps more correctly put, consistent and relevant measurement to key decision makers to allow them in optimise business performance.
As Maslow teaches us you need to begin with the most very basic needs and become more sophisticated over time. For decision making and information analytics the most basic need is help me understand what happened! While we may have access to many tools that can provide sophisticated and predictive analytics to be relevant you must start with the basics and build capability and awareness of the higher order needs over time.