12 During visits During the visits, the conditions are examined through observations, interviews and a review of documentation. The NPM’s main focus is always on conducting private interviews with the persons who have been deprived of their liberty. These interviews are a particularly important source of information, because the people deprived of their liberty have first-hand knowledge of the conditions. They are in a particularly vulnerable situation and have a special need for protection. Their experiences are an important and relevant source of information. Interpreters are used as required. Interviews are also conducted with the staff, management, health services and other relevant parties. Documentation is also obtained to demonstrate the conditions at the institution, such as routines and procedures, local guidelines, administrative decisions on the use of force, logs, plans and health documentation. The NPM focuses on obtaining information by different means from a number of sources. NORWEGIAN PARLIAMENTARY OMBUDSMAN National Preventive Mechanism ANNUAL REPORT 2017 — The NPM prepares adapted interview guides for the different groups to be interviewed during a visit. All the conversations take place in the form of partly structured interviews. — After visits A report is written after each visit. The report describes the findings and risk factors identified during the visit. On the basis of these findings, the Ombudsman issues recommendations to the institutions that aim to reduce the risk of people deprived of their liberty being subjected to torture or other cruel, inhuman or degrading treatment or punishment. The NPM visit team during a visit to the police immigration detention unit at Trandum in March 2017.