In many storage systems, stock is rotated on a first-in-first-out (FIFO) basis, which
implies that random access to every single load in the system may not be necessary. Hence, the right level of selectivity would ensure that, given a set of loads of the same type, only the oldest load needs to be easily accessible. This concept has, in fact, led to pallet flow racks, where loads are stored in lanes and each lane holds multiple loads of the same type. At any given time, only the loads in the front of each lane (which, by definition, are the oldest loads in each lane) are easily accessible. Pallet flow racks increase storage density by minimizing the space required by aisles. However, some space is wasted within each lane because the number of loads in a lane varies over time and, at any given instant, some lanes may be full while others are nearly empty.
(Gavriel Salvendy, Handbook of Industrial Engineering: Technology and Operations Management, page 1251)
Part Familiy Formation (time 11:30 13.03.2011)
During the preparatory stage, existing components are coded, classified, and later grouped into
families (Figure 19). The part family formation can be performed in several ways. Families can be formed based on geometric shapes or process similarities. Several methods can be used to form these groupings. A simple approach would be to compare the similarity of the part’s code with other part codes. Since similar parts will have similar code characteristics, a logic that compares part of the code or the entire code can be used to determine similarity between parts.
((Gavriel Salvendy, Handbook of Industrial Engineering: Technology and Operations Management, page 476)
Gantt Chart (time 09:55 am 13.03.2011)
Gantt Chart. The Gantt chart was developed by Henry Gantt about 1917 as a means for
scheduling work in a job shop. It has become the most easily understood portrayal of a scheduled plan for a variety of types of work (see Fig. 17.9.5).While it was used extensively prior to computer methods for scheduling projects, it was often demeaned by the comment, “It conceals more than it reveals.” Manual means for preparing Gantt charts were so time-consuming and expensive as to be practically “cast in bronze.” As a result, the tendency was to delay redrawing them until the project was well off schedule.
(Maynard's Industrial Engineering Handbook, McGrawHill, unit 17.190, page 2521)
Solutin heat treatment process (time 11:05 am 13.03.2011)
In the solution heat treatment process alloy is first heated above the solvus temperature and held until a homogeneous solid solution a(alfa) is produced. This step dissolves the 0(teta) precipitate and reduces any segregation present in the original alloy.
(Donald R. Askeland, The Science and Engineering of Materials, page 323)
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