Page 60 - Industrial Ventilation Design Guidebook

3.6 TARGET LEVEL ASSESSMENT 25

FIGURE 3.4 Process description. Division of process into such parts that their inputs, outputs, and
target levels can be specified. A subprocess can be source or separate area/room that is to be protected
from its environment.

Step 2: Needs
Clarify standards not related to legislation, such as those related to human
comfort, guidelines, codes of practice, and custom needs.
Step 3: Target Levels
Decide target levels based on musts and needs.