Results for the underlying problem-conventional priority , Mechanical Engineering

Results for the Underlying Problem

The rules mentioned above and several variants of these rules that became out to be inferior are tested for eight various conditions of the FMS for the production of turbochargers. All these presentation criteria are evaluated for 25 various simulations run and after that averaged. The 25 various simulation runs are produced from five various random basic part type sequences and five various random due date sequences. For a importance analysis of the dissimilarity of two policies, the outcome of all 25 runs was utilized in a Wilcox on test.

Initially, the easy rules were compared. This twisted out that for the three criteria Tmean, Trms, and Tmax and the eight cases identify, the subsequent rules outperformed the others:

(a) ODD best rule along with respect to all criteria under high time pressure;

(b) SL/OPN best rule along with respect to each criterion under low time pressure;

(c) CR best mean and rms tardiness in case 2 under average pressure.

Amongst the combined and split queue rules, the excellent are as:

(a) CR + SPT best rule along with respect to Tmean in all the conditions;

(b) SPT - T r = 0;

(c)    SPT / Sl u = 0;

The last two rules are the best ones along with respect to Tax in all the conditions and along with respect to Trms   under medium and high pressure.  For case 2 under low pressure, CR + SPT offer better results. For the underlying system also, the most complicated rules are outperformed via the easier ones.

Clearly, the identified priority rules for job shop scheduling can be divided in two classes depending upon their behavior under high pressure as:

(a)     Rules that use SPT for critical jobs; and

(b)     Rules that use SL or similar criteria for critical jobs.

The first class of rules attains the best values of Tmean at the cost of high values of Tmax. The second class avoids excessive delays of a minute fraction of the jobs at the cost of a superior value of Tmean. Inside these classes, some rules show a comparable performance. In the initially class, CR + SPT for our problem provided the excellent results; in the second best were ODD and SL/OPN. These three rules generated Pareto optimal results along with respect to the three criteria. In the individual machine case, the Pareto-optimal rules were EDD and MOD that in this case are identical along with ODD respective CR + SPT.

 

Posted Date: 3/5/2013 8:03:36 AM | Location : United States







Related Discussions:- Results for the underlying problem-conventional priority , Assignment Help, Ask Question on Results for the underlying problem-conventional priority , Get Answer, Expert's Help, Results for the underlying problem-conventional priority Discussions

Write discussion on Results for the underlying problem-conventional priority
Your posts are moderated
Related Questions
Urine preservatives - Specimen collection: Urine preservatives : preservatives have different roles but are usually added to reduce bacterial action or chemical decompo

advantages and disadvantages of locomotive boiler

Consider a trapezoidal channel with a bottom width of 4 m, side slopes of 3:1 (H:V), and a bottom slope of 0.002 that carries 50 cms. The channel has a Manning's roughness of 0.034

Q. Explain Fundamental of metal casting? (1)Melting the material (2)Allowing the molten metal to cool and solidify in the mould "A plane where the castings are made is ca

Internal combustion models of engine: The engines which develop power by combustion of fuel within the engine are called internal combustion engines. The examples of internal

Determine the loading on the beam: Shear force diagram for a loaded beam is illustrated in Figure. Determine the loading on the beam & therefore, draw the bending moment diagr

Steps for solving the problems when more than two coplanar forces are acting on the rigid body: The steps are as; 1. Check the Problem for the concurrent or Non concurren

State the types of foundations We saw the different types of foundations commonly adopted for specific situation. In actual practice the situations are not very simple both in

Gas Flow Rates Shielding gas flow requirements are based on cup & nozzle size, weld pool size & air movement . Generally, the flow rate increases in proportion to the cross s