Material: Data will be collected in two hospitals in the capital Region of Denmark, Rigshospitalet and Herlev Hospital. Each hospital will provide four focus groups, one containing consultant surgeons in general surgery, one trainee surgeons, one scrub nurses and one containing a mixture of anesthetists and anesthesia nurses. The two latter focus groups is included to get the perspectives of the surgeons' team members since international studies have demonstrated differences of opinion regarding the perceived quality of teamwork amongst operating theatre staff. This study will be the first to build in the opinions of the team members into a behavioural marker system. 3 individual interviews with surgeons will afterwards conducted in one of the hospitals to get a more in-depth discussion.