New rule with local one step ahead prediction: wls rule, Mechanical Engineering

New Rule with Local One Step Ahead Prediction: WLS Rule

Along with an observation to improve the performance measure of the system, a dynamic posteriori rule, the WLS that is weighted loss of slack rule used.

The weighted loss of slack rule evaluates the condition of all other operations in the respective queue whether operation j would be scheduled. This decision will reason a loss of slack for all the other operations waiting in the queue.  It is most crucial, whether an operation would have negative slack tsi after scheduling of operation j. Hence, the unsafe loss of slack of operation i because of the scheduling of operation j before i is:

         1087_New Rule with Local One Step Ahead Prediction-WLS Rule.png

In Eq. (6), the differences of the exponentially weighted slack after and before the scheduling of operation j are totaling up.  The  exponential  weighting  offers  an incentive to prefer long operations (that reason larger losses of slack than short ones) while their slack reduces and therefore assists to maintain the maximal tardiness same whereas still providing minute throughput times on the middle.

The queue is further divided into two subsequences. The high priority queue consists of those operations for that tsj < maxJ  oj  oi, that is the operations such have negative slack or might acquire negative slack because of the scheduling of several other operations before operation j. These dangerous operations are ordered as per to the above Eq. (6). The uncritical operations are scheduled as per to the ODD rule.

This is obvious that the WLS rule is an extremely good compromise among the two classes of rules. For extensive queues and high pressure, this dominates SL/OPN both in Tmean and Trms,

and it performs well in all situations while avoiding extreme values of Tmax. Thus, it can be  said  that  it  is  prime  candidate  for  a  good  simple  priority  rule  especially  in decentralized scheduling.

Posted Date: 3/5/2013 8:06:03 AM | Location : United States







Related Discussions:- New rule with local one step ahead prediction: wls rule, Assignment Help, Ask Question on New rule with local one step ahead prediction: wls rule, Get Answer, Expert's Help, New rule with local one step ahead prediction: wls rule Discussions

Write discussion on New rule with local one step ahead prediction: wls rule
Your posts are moderated
Related Questions
Copper-Beryllium Alloys Copper-beryllium alloys comprise between 0.6 to 2% Be and 0.2 to 2.5% Cobalt. Such alloys can be precipitation hardened and cold worked to improve a te

show a schematic circuit diagram of a electric hydraulic gear pump with adjustable with one direction flow and explain the operation

Closed, open and isolated system-Thermodynamics system: Sol: In thermodynamics the system can be defined as the quantity of matter or region in space upon which attention is

What is The Tunnel Diode and the Current Regulator Diode?

Equilibrium of body - force acted at any angle: Magnitude of force ' p ' which is required to move the body down the plane. When ' p ' is acted with an angle of φ.

Determine formula for Elongnation of body due to it''s Self Weight

Average force of resistance: A gun weighing 500 kN is utilized to fire a shell weighing 10 kN in a horizontal direction with a velocity of 500 metres/sec. With what initial ve

Explain Degree of Freedom - Jig and Fixture The complete location of components inside a jig or fixtures can be understood with the help of figure. The work piece is a

Q. Can you explain Corners and fillets ? Corners and fillets The intersection of the surfaces in casting must be smooth and forms no sharp angles. For this, the external a

Advantages and disadvantages of solid fuels