Online Service with Delay

2021 ◽  
Vol 17 (3) ◽  
pp. 1-31
Author(s):  
Yossi Azar ◽  
Arun Ganesh ◽  
Rong Ge ◽  
Debmalya Panigrahi
Keyword(s):  
Operating Systems ◽  
Metric Space ◽  
Operations Management ◽  
Salient Feature ◽  
Online Service ◽  
Total Delay ◽  
Chain Management ◽  
Spatial Exploration ◽  
Over Time ◽  
Special Metrics

In this article, we introduce the online service with delay problem. In this problem, there are n points in a metric space that issue service requests over time, and there is a server that serves these requests. The goal is to minimize the sum of distance traveled by the server and the total delay (or a penalty function thereof) in serving the requests. This problem models the fundamental tradeoff between batching requests to improve locality and reducing delay to improve response time, which has many applications in operations management, operating systems, logistics, supply chain management, and scheduling. Our main result is to show a poly-logarithmic competitive ratio for the online service with delay problem. This result is obtained by an algorithm that we call the preemptive service algorithm . The salient feature of this algorithm is a process called preemptive service, which uses a novel combination of (recursive) time forwarding and spatial exploration on a metric space. We also generalize our results to k > 1 servers and obtain stronger results for special metrics such as uniform and star metrics that correspond to (weighted) paging problems.

Mapping and Assessing Green Entrepreneurial Performance: Evidence from a Vertically Integrated Organic Beverages Supply Chain

2021 ◽  
Vol 7 (1) ◽  
pp. 78-98
Author(s):  
Heba Mohamed Adel
Keyword(s):  
Supply Chain ◽  
Supply Chain Management ◽  
Balanced Scorecard ◽  
Operations Management ◽  
Emerging Market ◽  
Business Environment ◽  
Theory And Practice ◽  
Chain Management ◽  
Green Production ◽  
Strategy Map

The purpose of this article is to use strategy mapping (SM) and balanced scorecard (BSC) in portraying and assessing green entrepreneurial supply chain management (GESCM) performance of a vertically integrated entrepreneurial supply chain in an Egyptian emerging market of organic beverages industry. Based on thematic literature review and qualitative research (in-depth interviews with experts, focus groups, observations, and reports’ analysis), multi-item measurement quantitative BSC scale and strategy map were proposed to measure and communicate the GESCM performance of a hierarchical chain with multiple nodes and cross-functional green practices. This article conceptually contributes to the active debate on contemporary GESCM performance measurement. It integrates the literature of green production and operations management, strategic management and entrepreneurial supply chain management (ESCM) to investigate the unexplored context of GESCM research. It empirically assesses GESCM performance of an attractive network using BSC and maps its strategy with its multidisciplinary environment-friendly practices. The GESCM performance was measured in terms of four integrated perspectives (innovative and proactive processes, learning and growth, financial gains and supply chain stakeholders’ delight). Results showed that BSC and SM are effective and efficient tools in managing the performance of a successful GESC in an emerging market. Royal Herbs’ BSC key performance indicators (KPIs), which were used in assessing a GESCM strategy, indicate improvements along the BSC’s four perspectives. Results give green entrepreneurs/manufacturers in an emerging market as Egypt a comprehensive view on how they can effectively assess/improve their GESCM performance. It draws attention to the importance of investing in GESCM practices for maintaining sustainable development in a clean business environment. It helps practitioners, academics and policymakers in Egypt to bridge the gap between theory and practice regarding GESCM performance. From an interdisciplinary perspective, it provides insights on improving the ESCM performance of the industry without harming its natural environment.

scholarly journals BENEFITS ASSESSMENT OF TRAINING ON SUPPLY CHAIN MANAGEMENT

2015 ◽  
Vol 7 (2) ◽  
Author(s):  
Claudemir L. Tramarico ◽  
Fernando A. S. Marins ◽  
Ligia M. S. Urbina ◽  
Valerio A. P. Salomon
Keyword(s):  
Supply Chain ◽  
Supply Chain Management ◽  
Inventory Management ◽  
Operations Management ◽  
Evaluation Model ◽  
Core Competencies ◽  
Critical Factor ◽  
Organizational Capability ◽  
Chain Management ◽  
Chemical Company

<p>Supply chain management (SCM) is a critical factor in the current global scenario. This organizational capability has a recent knowledge base, which is being accumulated, validated, and certified by groups like the Association for Operations Management (APICS). Therefore, training in SCM has been growing as one of the most convenient ways of becoming “Certified in Production and Inventory Management” (CPIM) from APICS. Companies all over the world have invested in SCM training; however, some companies have conditioned the continuity of their training programs to the benefits assessment. This paper contributes by proposing an evaluation model for specific program training on SCM. This model was applied in a global chemical company, which allowed capturing its impact on organizational and individual competencies, as well as on the core competencies. The proposed model includes the Analytic Hierarchy Process (AHP) and concepts in the SCM literature. The main result revealed by this research is that an SCM training based on APICS CPIM is really perceived as beneficial, in individual or organizational terms, for a real-world company. Therefore, this company should be confident that its SCM training program is improving and strengthening its core competencies.</p>

Multiple temporal perspectives extend sustainable competitiveness

2017 ◽  
Vol 37 (11) ◽  
pp. 1600-1624 ◽  
Author(s):  
Robert Klassen ◽  
Sara Hajmohammad
Keyword(s):  
Supply Chain ◽  
Supply Chain Management ◽  
Operations Management ◽  
Process Time ◽  
Temporal Orientation ◽  
Multiple Perspectives ◽  
Chain Management ◽  
Content Type ◽  
Starting Point ◽  
Short Termism

Purpose In operations and supply chain management, time is largely one-dimensional – less is better – with much effort devoted to compressing, efficiently using, and competitively exploiting clock-time. However, by drawing on other literatures, the purpose of this paper is to understand implications for the field of operations management if we also emphasize how humans and organizations experience time, termed process-time, which is chronicled by events and stages of change. Design/methodology/approach After a brief review, the limitations of the recurrent time-oriented themes in operations management and the resulting short-termism are summarized. Next, sustainability is offered as an important starting point to explore the concept of temporality, including both clock- and process-time, as well as the implications of temporal orientation and temporal conflict in supply chains. Findings A framework that includes both management and stakeholder behavior is offered to illustrate how multiple temporal perspectives might be leveraged as a basis for an expanded and enriched understanding of more sustainable competitiveness in operations. Social implications Research by others emphasizes the importance of stakeholders to competitiveness. By recognizing that different stakeholder groups have varying temporal orientations and temporality, managers can establish objectives and systems that better reflect time-based diversity and diffuse temporal conflict. Originality/value This paper summarizes how time has been incorporated in operations management, as well as the challenges of short-termism. Sustainability forms the basis for exploring multiple perspectives of time and three key constructs: temporal orientation, temporality, and temporal conflict. A framework is proposed to better incorporate temporal perspectives as a basis for competitiveness in operations and supply chain management.

Theory usage in empirical operations management research: a review and discussion

2016 ◽  
Vol 54 (10) ◽  
pp. 2413-2432 ◽  
Author(s):  
Thomas Kenworthy ◽  
Jaydeep Balakrishnan
Keyword(s):  
Operations Management ◽  
Empirical Data ◽  
Design Methodology ◽  
Theory Testing ◽  
Management Research ◽  
Content Type ◽  
Scientific Fields ◽  
Over Time

Purpose The purpose of this paper is to analyze more than three decades of theory testing published in leading operations management (OM) journals. Design/methodology/approach This piece examines the amount of theory testing, the extent to which theories are tested multiple times, and the disciplinary origins of the theories that are tested. Findings The analysis revealed that empirical OM researchers have increasingly responded to demands for more theory-driven knowledge over time. OM researchers are developing and using a wide array of domestic theories to understand empirical data. The examination also revealed a substantial focus on theory borrowed from other scientific fields. Originality/value The findings here suggest that OM is clearly a maturing discipline. As the discipline matures, it is important to consider to what extent borrowed theories and frameworks can offer value to OM. A preliminary vetting model is advanced in order to critically assess foreign theory. It is hoped that future screening promotes only the most useful non-domestic theory, thereby ensuring sufficient journal space for domestic theory and resulting in effective solutions to the pressing, practical problems of the OM field.

Lean resilience: AURA (Active Usage of Resilience Assets) framework for post-COVID-19 supply chain management

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dmitry Ivanov
Keyword(s):  
Supply Chain ◽  
Supply Chain Management ◽  
Value Creation ◽  
Operations Management ◽  
Future Research ◽  
Chain Management ◽  
Content Type ◽  
Digital Platforms ◽  
Supply Chain Resilience ◽  
Resilience Capabilities

PurposeSupply chain resilience capabilities are usually considered in light of some anticipated events and are as passive assets, which are “waiting” for use in case of an emergency. This, however, can be inefficient. Moreover, the current COVID-19 pandemic has revealed difficulties in the timely deployments of resilience assets and their utilization for value creation. We present a framework that consolidates different angles of efficient resilience and renders utilization of resilience capabilities for creation of value.Design/methodology/approachWe conceptualise the design of the AURA (Active Usage of Resilience Assets) framework for post-COVID-19 supply chain management through collating the extant literature on value creation-oriented resilience and practical examples and complementing our analysis with a discussion of practical implementations.FindingsBuilding upon and integrating the existing frameworks of VSC (Viable Supply Chain), RSC (Reconfigurable Supply Chain) and LCNSC (Low-Certainty-Need Supply Chain), we elaborate on a new idea in the AURA approach – to consider resilience as an inherent, active and value-creating component of operations management decisions, rather than as a passive “shield” to protect against rare, severe events. We identify 10 future research areas for lean resilience integrating management and digital platforms and technology.Practical implicationsThe outcomes of our study can be used by supply chain and operations managers to improve the efficiency and effectiveness by turning resilience from passive, cost-driving assets into a value-creating, inclusive decision-making paradigm.Originality/valueWe propose a novel approach to bring more dynamics to the notion of supply chain resilience. We name our approach AURA and articulate its two major advantages as follows: (1) reduction of disruption prediction efforts and (2) value creation from resilience assets. We offer a discussion on ten future research directions towards a lean resilience.

Protection Errors in Operating Systems: Inconsistency of a Single Data Value over Time

1975 ◽  
Author(s):  
Richard Bisbey ◽  
Popek II ◽  
Carlstedt Gerald ◽  
Jim
Keyword(s):  
Operating Systems ◽  
Data Value ◽  
Single Data ◽  
Over Time

Analytic Research and Quantitative Models

2008 ◽  
pp. 55-81
Author(s):  
Toru Higuchi ◽  
Marvin Troutt
Keyword(s):  
Supply Chain ◽  
Life Cycle ◽  
Supply Chain Management ◽  
Operations Management ◽  
Quantitative Methods ◽  
Subject Area ◽  
Background Information ◽  
Chain Management ◽  
Reference Guide ◽  
Management Forecast

This chapter provides two kinds of background information that we consider important to the subject area. First, we surveyed the supply chain management, operations management, and management science literatures for those works contacting life-cycle issues and at the same time that use quantitative or modeling approaches. We then developed synoptic summaries of these publications and provide some analysis of their central topics, trends, and themes. Hopefully the results will be a helpful reference guide to the related literature to date for both practicing managers and researchers. In the second part of the chapter, we introduce the standard quantitative methods and models used for mathematical life-cycle models. These have been developed under the label of diffusion models and most of the work has been carried out by marketing scientists. This topic should be useful to practitioners in making forecasts, constructing estimates related to capacity, and other supply chain management forecast and planning issues. We also note that some research needs in this area.

scholarly journals Assessment of Memorandum Writing in a Quantitative Business Context

2018 ◽  
Vol 82 (1) ◽  
pp. 38-52
Author(s):  
Julie Ann Stuart Williams ◽  
Joshua Schutts ◽  
Kristine Gallamore ◽  
Nicholas Amaral
Keyword(s):  
Student Performance ◽  
Communication Skills ◽  
Operations Management ◽  
Written Communication ◽  
Assessment Data ◽  
Business Context ◽  
Pedagogical Interventions ◽  
Business Course ◽  
Over Time

This article examines a manageable approach that provides students with significant opportunities to write and improve their writing over time in an introductory quantitative business course. The study examines six elements of written communication skills, as evidenced by assessment data from memorandum assignments administered following pedagogical interventions throughout the semester in an operations management course. Results demonstrate that student performance of audience identification, action-oriented request, and punctuation improved. Interestingly, student performance of grammar slightly decreased. A follow-up analysis indicates that some writing mistakes were related to a lack of proofreading. This article also presents original memorandum assignments and suggestions for improvement.

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