Volume 16, Issue 3, 2021/Journal Proceedings in Manufacturing Systems

Abstract: In a world of organizations with different typologies, more and more attention is paid to decision-making in conditions of uncertainty, because decision making is an art, but also a science of finding compromises. In management, the decision is particularly important because it offers the possibility to carry out efficiently the company's activities in close connection with the environment in which it operates, to establish and achieve the established objectives. It can be concluded that the managerial decision represents a special form of the decision and constitutes the most active and dynamic expression of the management. The paper aims to use research methods such as observation, synthesis, analysis, grouping and investigation, but also other tools of scientific knowledge to conduct a study on decision management in conditions of uncertainty in a Romanian company. The company recognizes that the success or failure of initiatives, challenges, often depends on how decisions are made. The company is based on a democratic leadership style characterized by a high degree of participation of the work team in making important decisions such as collective and collegiate decisions. This democratic style presupposes a management achieved through objectives, results. The organization is characterized by flexibility, adaptability, high motivation and competence of staff. With the data taken from the company, the graphic material of the work was made, they are interpreted so that the conclusions of the study result. A rich bibliographic material and sites presented at the end of the work on Bibliography were studied.

Key words: management, decision, uncertainty, Romanian company, success, failure.

pp 99-108 View full text

Comparative analysis of production flow scenarios in typographic industry

Gabriela Valeria NEAMȚU (FOLEA)^1,*, Cristina MOHORA², Dorel Florea ANANIA³, Emilia BĂLAN⁴

¹⁾ Eng. PhD student, Doctoral School of Industrial Engineering and Robotics, University "Politehnica" of Bucharest, Romania

²⁾ Prof., PhD Eng., Robots and Production Systems Department, University "Politehnica" of Bucharest, Romania

^{3, 4)} Assoc. Prof., PhD Eng., Robots and Production Systems Department, University "Politehnica" of Bucharest, Romania

Abstract: The paper presents the comparative analysis of a production flow of a flexographic typography by analysing the possibilities of reducing auxiliary times in order to make the process of obtaining printed products more efficient. Two work scenarios were studied, involving the printing of four products obtained in the same production line, with different processing times and auxiliary times for each. In Scenario 1 the independent printing of each product was carried out, and in Scenario 2 the methods FIFO, Line Balance and Minim Setup were applied. Scenario 1 resulted in a maximum machine occupancy time with the four products, and Scenario 2 resulted in 24 product series variants with four values of machine occupancy time, as follows: minimum value, maximum value and two intermediate values. The applied techniques allowed the identification of the best variant but also the identification of the facilities offered by the system through the components of the printing and flexographic die cutting groups, in order to reduce the auxiliary times respectively the constraints, grouping the printing of the products in a pre-determined order.

Key words: flexographic production, production flow, scenarios, process time, analysis.

pp.109-116 View fullext

The usage of RFID technology in wiring component storage systems

Ioana STEFAN (IORGA)^1,*, Constantin-Adrian POPESCU², Cicerone Laurentiu POPA³, Tiberiu Gabriel DOBRESCU⁴, Costel Emil COTET⁵

¹⁾ PhD Student, Robots and Manufacturing System Department, "Politehnica" University of Bucharest, Bucharest, Romania

²⁾ Lecturer, PhD, Robots and Manufacturing System Department, "Politehnica" University of Bucharest, Bucharest, Romania

³⁾ Assoc. Prof., PhD, Robots and Manufacturing System Department, "Politehnica"University of Bucharest, Bucharest, Romania

⁴⁾ Prof., PhD, Robots and Manufacturing System Department, "Politehnica" University of Bucharest, Bucharest, Romania

⁵⁾ Prof., PhD, Robots and Manufacturing System Department, "Politehnica" University of Bucharest, Bucharest, Romania

Abstract: In a fast-changing and highly competitive environment like the automotive industry, integrating the latest automation available solutions represents one of the easiest ways to increase productivity. Despite this fact, there are still suppliers in the automotive sector that disregard this possibility and decide to use basic handling equipment, instead of implementing one of the modern technological solutions available for increasing productivity by achieving a higher automation degree. Increasing productivity must be targeted on every level of the production process, from supplying the components and materials needed, to the delivery of the final product. One zone that could benefit from increasing the automation degree by implementing modern technology is represented by the warehouse. Improving warehouse process flow helps increase productivity on all the production phases and reduces costs. There are many modern technological solutions available for warehouse automation, but this paper focuses only on RFID technology. Therefore, the proposed simplified model presents the benefits of RFID technology application inside the components warehouse of a wiring harness producer. The presented RFID system is very flexible and can easily respond to challenges such as a large variety of stored items in different ways of packing, dynamic production supplying needs, replacing obsolete components, replacement of components due to the lack of raw material, or quality issues and so on. This paper aims to be a contribution to the integration of RFID technology in storage systems on a larger scale by pointing out the simplicity of implementing an RFID system to boost productivity.

Key words: storage systems, RFID, automotive, wiring harness, components warehouse, theoretical model, modern technology implementation.

pp. 117-123 View fullext

Perspectives of virtual commissioning using ABB RobotStudio and Simatic robot integrator environments: a review

Alexandru ANDREI^1,*, Adrian Florin NICOLESCU², Cristina PUPĂZĂ²

¹⁾ Ph.D. Student, Robots and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

²⁾ Prof., Ph.D., Robots and Manufacturing Systems Department, University "Politehnica" of Bucharest, Romania

Abstract: Due to the high demand for fast equipment development which is one of the main criteria of the ongoing industrial revolution, the evolution of virtual commissioning focused on the testing area of the new equipment and machine without damaging them. In the integration of the robot automation process, 40% of the average cost of implementation is addressed to software and programming development. Due to the many types of programming languages and different robot interfaces, one of the most challenging part of virtual commissioning is to decrease the complexity of implementation due to robot manufacturer variance through unifying these two main criteria. The article reviews and compares virtual commissioning methods in terms of hardware and software components used in the control of the master type elements as PLC and the control of the slave type elements as industrial robots. In the first part, the article reviews the main features of the latest version of ABB Robotstudio, which contains technologies such as virtual meetings, virtual reality, augmented reality, and an express virtual commissioning module. Secondly, the article reviews a new software from Siemens company which is dedicated to virtual commissioning applications, where is necessary to use programable logic controllers from Siemens and industrial robots from different manufacturers such as: Staubli, Denso, Yaskawa, and Kuka.

Key words: Virtual Commissioning, ABB Robotstudio, Offline Simulation, Simatic Robot Integrator, Augmented Reality.

pp. 125-131 View full text

Assessing toxic work environments

Sorin-Constantin BOTEZ^1,*, Gabriela Beatrice COTEȚ

¹⁾ PhD Eng., Master Student, Robots and Manufacturing Systems, University "Politehnica" Bucharest, Bucharest, Romania

²⁾ PhD Lecturer, Training Department for Teaching Career and Socio-Human Sciences, University "Politehnica" Bucharest, Bucharest, Romania

Abstract: Current paper aims to present some researches made in the field of toxic work environments and toxic employees at the level of individual behavior and working relationships in the organization. The authors present a survey to assess toxicity in the workplace by identifying toxic behavior in management and employees and how it affects members of the organization. The analysis of this survey intends to find out whether or not employees intend to leave the affected job. The general assumption is that employees remain in an organization despite the existence of toxic environment. In this paper, the general term "workplace toxicity" is used when referring to toxicity from any source, as researchers have generally focused on several elements, such as toxic leaders, toxic decision-making processes, toxic employees etc. One started from the idea of researching workplace toxicity, causes of its occurrence, and how a toxic environment influences the employees. Issues related to the level of toxic behavior within the organization and the level of perception of the toxicity of the organization by its members are addressed according to some demographic parameters such as gender, organization structure, seniority within the organization. The paper also examines the elements that generate toxicity within the organization and what motivates employees to stay despite the existence of a toxic work environment.

Key words: workplace toxicity, toxicity assessment, work environment, employee behaviour, toxic leaders.

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