## 3 Methodology: Requirements Analysis, Selection of Buildings, and Technologies
### Tackling Non-Technical Implications of the Instrumentation Measures  
Of all measures within LLEC, the extension of monitoring and control capabilities has most likely the largest impact on general staff members during both installation and operation. In addition to the new features offered by the developed systems, the following, mostly non-technical implications are, therefore, important to consider, and have been taken care of:  
* During the installation of sensors and actuators on the room level, the use of the room might be impaired. The extent and duration varies between hardly any implications for a few minutes (wireless components) and noticeable implications for a few hours with (a short) interruption of the power supply (wired components) Within the LLEC project, we try to reduce the impact to a minimum by selecting a hardware setup which limits the effects of the retrofitting of sensors and actuators in existing buildings.  
Moreover, the execution of proper preparations, including, e.g., pre-assembly, further reduces the disturbance of the user;
* Furthermore, users might have concerns regarding data privacy, especially with respect to sensors on the room level, which allow one to deduce insights into a user's behavior. Already in the early phase of development, an elaborated data protection concept has been developed and coordinated with the IT Committee of the Works Council and the Data Protection Officer to develop a system and a set of measures which comply with the European _General Data Protection Regulation_ (GDPR). The developed concept is based on the following main aspects. Firstly, measurement data is stored in secured databases, with certain precautions. Scientific staff with access to the system and databases have completed data protection training. Secondly, room users are only granted access to their own rooms' data and only if all users assigned to the room digitally sign a user consent form. An elaborated digital workflow has been developed and implemented, incorporating the allocation of users to rooms stored in a dedicated database of the building department. If a user moves out of a room, access to the data of that room is automatically revoked for this user. In line with this, access is blocked for all users, in case a new user moves in, until every necessary consent is given. Irrespective of the users' consent, the measurement data can be used at any time for scientific purposes in an anonymised and/or aggregated form. This is important, since the sensors serve many scientific studies, and for many of the research activities, it is very important to capture the data in all rooms, e.g., due to the thermal coupling between adjacent rooms;
* Although the measures taken offer additional functionalities, users have to become used to the operating concept after installation. To facilitate this process within LLEC, we provide easy access to supporting information, e.g., manuals which are also kept updated during the whole process of development.  
To involve the users early, the planned measures have, moreover, been presented and discussed in multiple workshops since the beginning. In addition, users are continuously informed about inspections for planning purposes, installation measures, and new developments by e-mail.