England coach Andy Flower joined the captains of both sides in calling for improved use of the Decision Review System (DRS) in the remaining two Ashes Tests against Australia.
Holders England retained the Ashes after the third Test at Old Trafford ended in a rain-affected draw on Monday, leaving the home side 2-0 up with two to play ahead of the fourth Test in Durham starting on Friday.
But once again the use of DRS by the officials this Ashes was a major talking point after yet more contentious rulings in Manchester.
"Firstly umpiring is a very tricky business but I would say that there are very clear protocols to use and to stick to and I think some calm decision-making needs to be made over the next two Tests," Flower said Tuesday.
Sometimes the available technology has contradicted itself and former Zimbabwe batsman Flower added: "I think there are improvements that can be made.
“There are improvements in the use of the technology and the use of experts who know how to use the technology that could make a difference to getting better results."