Evaluating a Sustainable Intelligent Logistic System (ILS) Utilizing O-S Data and Holistic Managerial Models
Table 3
Definitions of MRLS architectures.
Qualitative/quantitative architectures
Definitions
Speeds (m/s),
It is the linear movement of MRLS about X-Y axis. The speed of MRLS is recorded by the computer’s memory and controlled by lining up the path or PLC component of MRLS with servo-controller unit.
Degree of freedom,
It is related to motions of robot’s arms and occurs due to independent joints, which provide the freedom of movement for the MRLS manipulators, either in a linear or rotational sense. Most of the MRLS have six degrees of freedom.
Unit load (kg),
It is the weight carrying capacity of MRLS. It is observed that MRLSs are available in a broad range such as carrying weight from 0.5 kg to as heavy as up to 1000 kg.
Power (unit/hrs),
It refers to the electrical energy, which is supplied to operate MRLSs. One unit is generally measured in terms of KW/hr.
Purchasing cost ($),
It is the cost associated with buying the MRLS from vendor for producing the goods. It is reflected by $ at global standards.
Maintenance cost ($/annum),
It is the expenditure incurred to avoid the sudden breakdown or failure in MRLSs. These costs might be spent for the ordinary maintenance such as repairing and oiling of MRLS.
Depreciation/year,
It reflects the reduction in value of MRLS within a fiscal year. Each tangible asset’s value, i.e., equipment, vehicles, and robots, declines with respect to time.
Overall efficiency (%),
It is described as ratio of actual or produced output to standard/expected output. The efficiency of MRLS is about 75% to 90% (without setup time). It can be calculated, for example, MRLS is expected to produce 100 pieces per one hour and produce 80 in reality. OE is estimated to be 0.8 and 80% (with product of 100).
Fitness to production (%),
It refers to percentage of utilization of MRLS towards addressing the various subsidiary tasks/activities of production
Quickness to tasks (%),
It is the ability to react and alter the quick physical position of MRLS with motive to achieve rich production rate under least cost with high degree of quality
