Elisa Negri

Elisa Negri
Politecnico di Milano | Polimi · Department of Management, Economics and Industrial Engineering DIG

About

44
Publications
27,151
Reads
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2,326
Citations
Citations since 2016
39 Research Items
2298 Citations
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20162017201820192020202120220200400600
20162017201820192020202120220200400600
20162017201820192020202120220200400600

Publications

Publications (44)
Article
Production scheduling has a long history of research but still presents open challenges, when considering production systems with uncertainty. The digitization, and in particular Digital Twins, may play a role in progressing the research field. The paper proposes a framework to exploit the Digital Twin synchronization with the field to include heal...
Article
Nowadays, manufacturing firms need the reconfigurability capability to be responsive in the current context characterised by unpredictable and frequent market changes and the reduction of product life cycle. Despite the relevance of the subject, a challenge for practitioners is the development of a strategy aimed to increase the level of reconfigur...
Article
In the context of an increasing digitalization of production processes, Digital Twins (DT) are emerging as new simulation paradigm for manufacturing, which leads to potential advances in the production planning and control of production systems. In particular, DT can support production control activities thanks to the bidirectional connection in ne...
Article
Full-text available
Research on scheduling problems is an evergreen challenge for industrial engineers. The growth of digital technologies opens the possibility to collect and analyze a great amount of field data in real-time, representing a precious opportunity for an improved scheduling activity. Thus, scheduling under uncertain scenarios may benefit from the possib...
Article
Full-text available
Nowadays, one important challenge in cyber-physical production systems is updating dynamic production schedules through an automated decision-making performed while the production is running. The condition of the manufacturing equipment may in fact lead to schedule unfeasibility or inefficiency, thus requiring responsiveness to preserve productivit...
Article
Full-text available
Digital Twin (DT) is considered a key approach to enhance the system reactivity to uncertain events due to its ability to getting data from the field and triggering actions on the physical asset. Given the modern technological and rapidly changing work environment, it is likely that in the next years companies will need to retrofit their manufactur...
Article
Full-text available
In the recent years, several research activities focused on the design, development and deployment of software architectures addressed to the monitoring, management and control of industrial plants, since the ongoing digitalisation of manufacturing companies demanded guidelines and cutting-edge solutions to the research community. In this context,...
Conference Paper
The emergence of technologies linked to the Industry 4.0 paradigm is increasingly influencing the design and management of production systems. However, applications related to assembly lines are scarcely explored in the literature. Hence, in this paper, a Digital Twin-based approach to real-time assembly line balancing problem (ALBP) in the i-FAB l...
Article
Full-text available
The paper aims at proposing a card controlling model to improve the standard CONWIP procedure, granting a similar system throughput while reducing Work In Progress (WIP) levels. To achieve this objective, the authors developed a Digital Twin-based production control system including a reinforcement learning algorithm (i.e. Q-Learning). The Digital...
Article
Industry 4.0-based manufacturing systems are equipped with Cyber-Physical Systems that are characterized by a strong interlinkage between the real world and the digital one: actions in one world have an impact on the other. In this paradigm, Digital Twins (DT) are defined as simulation models that are both getting data from the field and triggering...
Chapter
The Digital Twin (DT) is one of the main concepts associated to the Industry 4.0 wave. This term is more and more used in industry and research initiatives; however, the scientific literature does not provide a unique definition of this concept. The chapter aims at analyzing the definitions of the DT concept in scientific literature, retracing it f...
Article
Full-text available
The recent digitalization of manufacturing companies, driven by "Industry 4.0" guidelines, introduces a series of challenges and opportunities both for enterprise and research environments. In this perspective, a debated subject is the interfacing of hardware, because logistic challenges and production assets are moving towards the adoption of Inte...
Article
The Industry 4.0 is pushing a fast evolution in all manufacturing operations under heterogeneous aspects. Maintenance, in all its numerous declinations along the life cycle of a production asset, is no exception. A myriad of decisions need taking—often on short time horizons, involving different physical and technological domains, and with limited...
Article
In recent years, digitalization has taken an important role in the manufacturing industry. Digital twins (DT) are one of the key enabling technologies that are leading the digital transformation. Integrating DT with IoT and artificial intelligence enables the development of more accurate models to improve scheduling tasks, production performance in...
Article
In the Industry 4.0 era, the Digital Twin (DT), virtual copies of the system that are able to interact with the physical counterparts in a bi-directional way, seem to be promising enablers to replicate production systems in real time and analyse them. A DT should be capable to guarantee well-defined services to support various activities such as mo...
Article
Full-text available
The advent of Industry 4.0 technologies and in particular the Cyber-Physical Systems, Digital Twins and pervasive connected sensors is transforming many industries, among which smart scheduling is one of the most relevant. This paper contributes to the research on scheduling by proposing a framework to include equipment health predictions into the...
Article
In the last years, the selection of the most suitable simulation software to correctly face industrial problems has become vital for companies. The choice should be made among several possibilities and some companies, especially SMEs, may not have the appropriate tools. Moreover, a change of perspective is detected in industry: the technological ev...
Chapter
Full-text available
In today's competitive global environment, manufacturers are offered unprecedented opportunities to build hyper-efficient and highly flexible plants, towards meeting variable market demand, while at the same time supporting new production models such as make-to-order (MTO), configure-to-order (CTO) and engineer-to-order (ETO). During the last coupl...
Article
Full-text available
Manufacturing companies are experiencing the fourth industrial revolution characterised by the introduction of new technologies into production equipment, such as the Cyber Physical Systems and the Digital Twin simulations. Companies are then challenged by the digitization of products and production systems information, which leads to new potential...
Article
In the last decade manufacturing experienced a shift towards digitalization. Cost decrease of sensors, wireless connectivity, and the opportunity to store big amounts of data pushed a process towards a next generation of IT industry. Manufacturing now has the opportunity to gather large quantities of data, coming from different areas, such as produ...
Article
This paper provides a discussion about modularization of production systems equipment (i.e. logistic or manufacturing equipment) with embedded controllers that are at the basis of the paradigm of CPS (Cyber Physical Systems). The paper strongly grounds both on a solid scientific background and on an industrial case study implementation, thus, provi...
Article
Full-text available
This work is an explorative study to reflect on the role of digital twins to support decisionmaking in asset lifecycle management. The study remarks the current convergence of needs for decision support from Asset Management and of potentials for decision support offered by Digital Twin modeling. The importance of digital twins is evident through s...
Article
Most of the research works on methods and techniques for solving the job-shop scheduling problem (JSSP) propose theoretically powerful optimisation algorithms that indeed are practically difficult to apply in real industrial scenarios due to the complexity of these production systems. This paper aims at filling the gap between research and industri...
Article
Full-text available
The Digital Twin (DT) is one of the main concepts associated to the Industry 4.0 wave. This term is more and more used in industry and research initiatives; however, the scientific literature does not provide a unique definition of this concept. The paper aims at analyzing the definitions of the DT concept in scientific literature, retracing it fro...
Article
Information technologies grow rapidly nowadays with the advance and extension of computing capabilities. This growth affects several fields, which consume these technologies. Industrial Automation is not an exception. This publication describes a general and flexible architecture for implementing Manufacturing Execution System (MES) function, which...
Conference Paper
Full-text available
The Job Shop Scheduling Problem (JSSP) is recognized to be one of the most difficult scheduling problems, being NP-complete. During years, many different solving techniques were developed: some techniques are focused on the development of optimization algorithms, whilst others are based on simulation models. Since the 80s, it was recognized that a...
Conference Paper
Full-text available
“The most profound technologies are those that disappear… They weave themselves into the fabric of everyday life until they are indistinguishable from it” wrote computer scientist and visionary Mark Weiser nearly 25 years ago in his essay “The Computer for the 21st Century.” It turns out he was right: in the age of “Industry 4.0”, digital technolog...
Conference Paper
Full-text available
Within the era of Industry 4.0, digital technologies are seen as the main drivers for manufacturing industry transformation. If on one hand manufacturing companies have to be able to "ride" this wave of transformation in order to remain competitive, on the other hand, before investing in digital technologies, they have to understand what their curr...
Article
Industry is facing an era characterised by unpredictable market changes and by a turbulent competitive environment. The key to compete in such a context is to achieve high degrees of responsiveness by means of high flexibility and rapid reconfiguration capabilities. The deployment of modular solutions seems to be part of the answer to face these ch...
Article
The paper presents a methodology for the integrated sustainability assessment of a product-service system lifecycle, with the purpose to support continuous improvement on the side both of the manufacturer and of the user. Its eight steps are an extension of ISO 14040 life cycle assessment and consider all three sustainability dimensions - economic,...
Article
This work presents an economic and environmental impact assessment of maintenance services in order to evaluate how they contribute to sustainable value creation through field service delivery supported by advanced technologies. To this end, systems dynamics is used to assist the prediction of economic and environmental impacts of maintenance servi...
Article
Full-text available
Cyber Physical Systems are an evolution of embedded systems featuring a tight combination of collaborating computational elements that control physical entities. CPSs promise a great potential of innovation in many areas including manufacturing and production. This is because we obtain a very powerful, flexible, modular infrastructure allowing easy...
Article
In the last years, attention has been devoted to the development of ontologies, which are ICT conceptual models allowing a formal and shared representation of a particular domain of discourse, and to the use of these representations in a variety of contexts, among which also the industrial engineering can be counted. Within the industrial engineeri...
Conference Paper
The paper illustrates a production systems ontology that models the discrete manufacturing, process production and the logistics domains. This ontology is used to allow semantic interoperability within a control architecture based on semantically-enriched Web Services that has been developed within the European funded project eScop. This architectu...
Book
Full-text available
MSEE represents an initial but decisive step towards uplifting manufacturing services to a much higher engineering maturity level, by developing new models, processes and tools (called MSEE Bag of Assets), with the final aim of a peer-to-peer interconnection between service engineering and product engineering along the whole product-service lifecyc...
Conference Paper
The paper illustrates the role of modeling of shop floor to support an innovative solution for the control architecture of automated manufacturing systems. One of the main characteristics of manufacturing systems domain is, in fact, the variety of configurations that manufacturing systems can assume and this may prevent the possibility to easily ad...

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