the usage of the floor areas of the fire-affected buildings is as illustrated in Figure2.
There were four production areas in the factory building,designated as OP1-OP4. In OP1, the four rooms over the area shown shaded in green in Figure2 were class 7 clean rooms.
At the time of the fire, OP4 was essentially vacant with three SMT machines that had yet to be installed. OP1, OP2 and OP3 had five, five and eight SMT lines respectively.