On the AXELOS website you can find my blog how the Directing Successful Projects with PRINCE2 guide can help you with decision latency.
‘The CHAOS Report’ 2018 from the Standish Group sees decision latency as one of the key factors why so many projects fail. In other words, if you want to improve project success, you have to speed up your decision-making. The Standish Group studied this decision latency for over a decade and stated that a project will create one decision for every $1,000 in project labour cost. If it takes hours to make a decision, you must find ways to reduce this interval by decentralizing the decision making and eliminating steps that take time but have no value, e.g. too many meetings. Simply reducing decision latency can improve your project performance by 25%.
See for the rest of this blog: AXELOS blog