Project management for varying fields of work differ in the challenges they face and how they have to be tackled. When being a project manager for building a school or skyscraper, there are more mechanical regulations that need to be looked at. The building must be able to sustain and hold a certain weight limit and be built with certain criteria. While this also applies to medical devices to a certain extent, there are certain other aspects that need to be examined. Medical devices need to be tested at several levels. Initially, the medical device must undergo thorough animal trials, then clinical trials, and then after thorough examination it can be brought to the general population. It usually takes several years for this entire process to be completed. The medical device will be interacting with human beings and thus has an additional sense of pressure and area of management. Project management is difficult regardless of the task at hand, however, specific tasks will have specific challenges.