Abstract: A business process is enacted in a production facility employing a computer managed manufacturing execution system or manufacturing operation management system. The MES/MOM systems operate in an event-driven environment based on handlers orchestrated by events. The method includes: providing and parsing a business process model; creating precompiled, closed source command handlers and event handlers; creating entities of a work process model in an operational domain of the system; and, based on the work process model, running a work process, instancing the business process, by using the precompiled, closed source command handlers and event handlers, the command handlers working on tokens that are differentiated for the different types of elements, are created by the command handlers for each element in a run provided for by the enactment and, for each element, are differentiated according to whether the run to which the token belongs is actually executed or skipped.

Abstract: A method (10) of bi-directional optical communication, the method comprising: generating (12) a first optical communication signal for transmission in one direction through an optical fibre, generating the first optical communication signal comprising: receiving information for transmission and generating (14) a baseband signal comprising a representation of the information; performing digital upconversion (16) of the baseband signal to form an upconverted baseband signal; performing optical modulation (18) of an optical carrier signal with the upconverted baseband signal; and restricting an optical spectrum of the first optical communication signal to a first portion of an optical channel frequency slot by performing one of digital filtering (16) in addition to digital upconversion and optical filtering (36) after optical modulation; and receiving (20) a second optical communication signal transmitted in an opposite direction through the optical fibre, the second optical communication signal having an optica

Abstract: A method (10) of bi-directional optical communication, the method comprising: generating (12) a first optical communication signal for transmission in one direction through an optical fibre, generating the first optical communication signal comprising: receiving information for transmission and generating (14) a baseband signal comprising a representation of the information; performing digital upconversion (16) of the baseband signal to form an upconverted baseband signal; performing optical modulation (18) of an optical carrier signal with the upconverted baseband signal; and restricting an optical spectrum of the first optical communication signal to a first portion of an optical channel frequency slot by performing one of digital filtering (16) in addition to digital upconversion and optical filtering (36) after optical modulation; and receiving (20) a second optical communication signal transmitted in an opposite direction through the optical fibre, the second optical communication signal having an optica