jasima.shopSim.prioRules.basic.SRPTPerPT Maven / Gradle / Ivy

/*******************************************************************************
 * This file is part of jasima, v1.3, the Java simulator for manufacturing and 
 * logistics.
 *  
 * Copyright (c) 2015 		jasima solutions UG
 * Copyright (c) 2010-2015 Torsten Hildebrandt and jasima contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 *******************************************************************************/
package jasima.shopSim.prioRules.basic;

import jasima.shopSim.core.PR;
import jasima.shopSim.core.PrioRuleTarget;

/**
 * This class implements the Remaining Processing Time per Imminent Processing
 * Time rule. This is rule 10 in Blackwater et al. (1982)
 * "A state-of-the-art survey of dispatching rules for job shop operations". It
 * seems to perform well especially for the makespan objective.
 * 
 * @author Torsten Hildebrandt, 2011-12-01
 * @version 
 *          "$Id: SRPTPerPT.java 753 2015-07-27 15:29:49Z [email protected] $"
 */
public class SRPTPerPT extends PR {

	private static final long serialVersionUID = -6242815299110537440L;

	@Override
	public double calcPrio(PrioRuleTarget job) {
		return job.remainingProcTime() / job.getCurrentOperation().procTime;
	}

}