LEKIN® – Flexible Job-Shop Scheduling System

Announcement: The version that can be downloaded has been upgraded
and allows now for 50 jobs, 20 work centers and 100 machines.

LEKIN® is a scheduling system developed at the Stern School of Business, NYU. Major parts of the system were designed and coded by Columbia University students. LEKIN® was created as an educational tool with the main purpose of introducing the students to scheduling theory and its applications. Besides that, the system’s extensibility allows (and encourages) to use it in algorithm development. The project has been directed by Professor Michael L. Pinedo, Professor Xiuli Chao and Professor Joseph Leung. This development has been partially supported by the National Science Foundation.

With your comments and suggestions, you are always welcome to contact Michael Pinedo or Andrew Feldman.  Before reporting a bug, please download the newest version and make sure that this bug has not been fixed yet.

Developed for


System requirements

Screen Shots

Data Entry (98K)

Full Screen (211K)

Gantt Chart (139K)

Objective Chart (133K)


Supervised by

Michael Pinedo

Department of Information, Operations & Management Sciences - OM Group
New York University, Leonard N. Stern School of Business
New York, NY

Xiuli Chao

Department of Industrial Engineering
North Carolina State University

Raleigh, NC

Joseph Leung

Department of Computer Science
New Jersey Institute of Technology,

Newark, NJ

Programmed by

Andrew Feldman

Paradigm Asset Management Company
New York, NY

Algorithms by

Nutthapol Asadathorn

Dept. of Industrial and Manufacturing Engineering,
New Jersey Institute of Technology,
Newark, NJ

Stephan Kreipl

Senior Consultant Supply Chain Management
SAP Deutschland AG & Co. KG

Marcos Singer

Escuela de Administración
Pontificia Universidad Católica de Chile
Partially supported by FONDECYT 1971021

Alkis Vazacopoulos

Director, Dash Optimization, Inc. USA

Ya Yang

We are very saddened by the accident that claimed the life of our colleague and friend, Ya Yang. She was a great person and a talented scholar. In our hearts, she will always be with us.

LEKIN® team.

The authors would like to thank Rungson Samroengraja, Manish Choudhury, Melanie Drake, Jenny Poon and other students of Operations Consulting class, Spring 1998, Stern School of Business, NYU for extensive testing and useful comments that helped debugging and improving LEKIN®.

The Academic version of LEKIN® is available for download. The Industrial version of the system is in the design stage.

Download April 2002 version of LEKIN®

Download the latest version of LEKIN® (October, 2010)