RT Journal Article SR Electronic T1 The problem with red, amber, green: the need to avoid distraction by random variation in organisational performance measures JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 81 OP 84 DO 10.1136/bmjqs-2015-004951 VO 26 IS 1 A1 Jacob Anhøj A1 Anne-Marie Blok Hellesøe YR 2017 UL http://qualitysafety.bmj.com/content/26/1/81.abstract AB