**4.3 Method of investigation**

To investigate the hypotheses under the item Motivation and Hypotheses, the reviewed literature covering both types of data to combat the COVID-19 pandemic by adopting architectural tools and approaches in addition to medical and health means are identified and then classified under eight main categories to be finally summarized into valid guidelines and recommendations. Their validity for being useful, adoptable, and recommended guidelines for various purposes come as a result of the following:


*Perspective Chapter: Guidelines to Cope with Challenging Problems Facing the Building… DOI: http://dx.doi.org/10.5772/intechopen.109169*


#### *4.3.1 Descriptive qualitative method*

The method used to research the hypotheses stated in this study is the descriptive qualitative method [49–51], and it is developed and applied carefully to ensure that the resulting outputs in terms of guidelines and other suggestions are valid and reliable. This method involved a rich collection of data from various mentioned sources.
