A system, method, and software product for an accelerated design optimization is described. The method identifies a first portion of cube data that is stored in a cube cache and a second portion of the cube data that is not stored in the cube cache. The housing further includes an openable flap disposed over the pockets in the flat condition for closing the pockets, wherein the flap extends from one of the pockets and wherein the other of the pockets includes a slot for receipt of a distal end of the flap in the closed condition. Three masking steps are required to manufacture the three layers of lines. The central control module controls the fan to operate in a silent mode or a cooling mode. Further, there is provided a detaching jig including: latch release portions which are inserted between the pluggable module and the cage; lock portions which allow the pluggable module to be locked in the detaching direction; and a handle portion for detaching the pluggable module from the cage.