Factors that caused the fire

What were the main factors that caused the fire?
Were there any design flaws in the building that contributed either to the start of the fire or the growth of the fire in size?
Were there issues with the building design that hindered the fire response?
How could a thorough hazard analysis, as a part of the Prevention through Design (PtD) process, have helped eliminate hazards in the structure?
How could PtD have been used to either prevent the fire from occurring or reduce the severity of the outcome?
Explain where PtD should be used in the design process to prevent this type of incident from happening again.