By Chris Dorrell Management quality among British firms has shown signs of improving over the past few years, according to official data, which could provide the economy with a sorely needed productivity boost. The Office for National Statistics’ (ONS) third management survey showed average management scores had improved in the last three years, largely driven by improvements among under-performing firms. The mean management score was 0.61 in 2023, up from 0.53 in 2020. Overall management practices have improved since 2016Management practices include the use of targets, key performance indicat…