Mohan Gopalakrishnan | Arizona State University (original) (raw)

Papers by Mohan Gopalakrishnan

2011 3rd International Conference on Electronics Computer Technology, 2011

Asymmetric dual half-bridge PWM-FM converter with four outputs is discussed. Four independent reg... more Asymmetric dual half-bridge PWM-FM converter with four outputs is discussed. Four independent regulated outputs are obtained with two legs and four switches. Among the four outputs, two are regulated through the switching frequencies of two asymmetrical half-bridge converters and the other two are regulated through duty cycles. The outputs are regulated over a wide range of input voltages and load

Journal of Business Logistics, 2015

International Journal of Production Research, 1995

This paper addres.xs the single-level capacitated lo1 sizing problem (CLSP) with setup carryover.... more This paper addres.xs the single-level capacitated lo1 sizing problem (CLSP) with setup carryover. Specifically, we consider a class of production planning problems in which multiple products can be produced within a time period and significant setup times are incurred ...

The Journal of Supply Chain Management, 2010

Eur J Ind Eng, 2008

... Early research by Naddor (1975), Gardner and Dannenbring (1979), Billington (1984) and Rosenb... more ... Early research by Naddor (1975), Gardner and Dannenbring (1979), Billington (1984) and Rosenblatt (1984) has addressed the multi-item inventory problem subject to budget constraints. Recently, Abdel-Malek et al. (2004 ...

The Journal of the Operational Research Society, 2007

Strategic Finance, Dec 1, 2007

Purpose - To describe target costing and product development in a US-based, global manufacturing ... more Purpose - To describe target costing and product development in a US-based, global manufacturing company. Design/methodology/approach - Differentiates target costing from cost-plus pricing and describes how the case company uses it to control costs during product and process design for new products. Illustrates and discusses the five steps involved: defining the new product, establishing a target selling price acceptable to consumers, deducting the required profit margin to arrive at target cost, breaking this down by product components and designing out excess costs. Shows how the company integrates target costing into the whole product development process and stresses that cross-functional teams are vital. Originality/value - Explains clearly how target costing works in this company.

Greater competition has increased pressure to reduce product costs and design times. To introduce... more Greater competition has increased pressure to reduce product costs and design times. To introduce products more quickly, some companies begin designing products before all relevant design information is available and continue modifying product specifications during the design process. We experimentally examine how cost goals (specific cost target versus general cost goal) and information timing (receive all design information upfront versus staggered throughout the design period) interact to influence cost reduction. Using goal-setting theory and literature on information timing, we predict and find that information timing has a moderating effect on the effectiveness of cost goals. Specifically, we find that staggered, as opposed to upfront, information improves performance for groups with a general cost goal, but hinders performance with a specific cost target. Additionally, consistent with prior goal research, we find that groups with a specific cost target outperform those with a...

Introduction The Capacitated Lot-Sizing Problem (CLSP) is defined as follows: Given plant capacit... more Introduction The Capacitated Lot-Sizing Problem (CLSP) is defined as follows: Given plant capacity and production demands for each production item and for each period of a fixed horizon, determine how many units of each product to make in each period so as to minimize the sum of Inventory and Setup Costs. We study a variant of this problem in which setup times are explicitly considered and each period is large enough to allow for several production batches and setups. This talk is based on a joint paper with Mohan Gopalakrishnan, Ding Ke and Srimathy Mohan [3], and on current work with Maria Cristina Nogueira Gramani (Campinas, Brazil) [1]. Motivation for these research e#orts first came from a real-life problem that was submitted by a pulp and paper company to the Alabama Productivity Center (University of Alabama at Tuscaloosa). In his PhD dissertation, M. Gopalakrishnan built for this problem a model in which setups can be carried from one period to the next [2]: a setup carryover

Accounting, Organizations and Society, 2015

ABSTRACT Many firms that compete based on the development of new and innovative products have beg... more ABSTRACT Many firms that compete based on the development of new and innovative products have begun to adopt concurrent new product development (NPD) processes in which product design phases occur in a non-linear and iterative manner. While concurrent NPD processes increase flexibility and reduce time-to-market as compared to traditional sequential processes, concurrency increases task uncertainty since the product design process begins before all important product features and specifications have been established. Such changes can result in costly redesign and rework. Prior research suggests target costing, where product design teams are assigned specific cost goals, is an effective method of controlling costs in sequential NPD. Even so, it is unclear whether target costing will improve cost reduction performance when combined with a concurrent NPD process due to increased task uncertainty. We examine experimentally the ability of product design groups to achieve specific or general cost reduction goals under simulated sequential or concurrent NPD. We predict and find that the nature of the NPD process moderates the effect of specific cost reduction goals on actual cost reduction performance. While specific cost goals result in higher reductions in product cost than general cost goals under a sequential NPD process, specific goals are no better than general goals in motivating design groups to reduce product cost under a concurrent NPD process; thus, we demonstrate boundary conditions on the usefulness of target costing as a cost control method.

SSRN Electronic Journal, 2000

ABSTRACT Increased competition has increased companies' desire to lower costs while also ... more ABSTRACT Increased competition has increased companies' desire to lower costs while also increasing the need to shorten product design and redesign times by using a staggered redesign process (where not all relevant redesign information is available upfront). Target costing is generally perceived as more effective at lowering costs compared to general "do your best" cost reduction goals. However, using goal-setting theory, we suggest that this result will not hold in a staggered information condition. Using a Lego truck redesign experiment, we find that specific cost targets (or goals) result in lower costs compared to general goals when all relevant design information is available upfront. However, staggered information reduces performance for groups with specific goals and improves performance for groups with general goals. As a result, there is no significant performance difference between specific and general goals when information is staggered. To the extent that companies are increasingly emphasizing faster design times and relevant design information is staggered, the results of this study offer an explanation of why such firms may not embrace target costing.

Management Science, 1997

The dynamic nature of an operating environment, such as machine utilization and breakdown frequen... more The dynamic nature of an operating environment, such as machine utilization and breakdown frequency results in changing preventive maintenance (PM) needs for manufacturing equipment. In this paper, we present an approach to generate an adaptive PM schedule which maximizes the net savings from PM subject to workforce constraints. The approach consists of two components: (a) task prioritization based on a

Decision Sciences, 2014

ABSTRACT Motivated by the technology division of a financial services firm, we study the problem ... more ABSTRACT Motivated by the technology division of a financial services firm, we study the problem of capacity planning and allocation for Web-based applications. The steady growth in Web traffic has affected the quality of service (QoS) as measured by response time (RT), for numerous e-businesses. In addition, the lack of understanding of system interactions and availability of proper planning tools has impeded effective capacity management. Managers typically make decisions to add server capacity on an ad hoc basis when systems reach critical response levels. Very often this turns out to be too late and results in extremely long response times and the system crashes. We present an analytical model to understand system interactions with the goal of making better server capacity decisions based on the results. The model studies the relationships and important interactions between the various components of a Web-based application using a continuous time Markov chain embedded in a queuing network as the basic framework. We use several structured aggregation schemes to appropriately represent a complex system, and demonstrate how the model can be used to quickly predict system performance, which facilitates effective capacity allocation decision making. Using simulation as a benchmark, we show that our model produces results within 5% accuracy at a fraction of the time of simulation, even at high traffic intensities. This knowledge helps managers quickly analyze the performance of the system and better plan server capacity to maintain desirable levels of QoS. We also demonstrate how to utilize a combination of dedicated and shared resources to achieve QoS using fewer servers.

Production Planning & Control, 2007

... Abstract. In a previous work (Chandrashekar, A., and Gopalakrishnan, M., Purchase cards and i... more ... Abstract. In a previous work (Chandrashekar, A., and Gopalakrishnan, M., Purchase cards and inventory controlan analytical framework. Prod. Plan. ... In an earlier paper (Chandrashekar andGopalakrishnan 20051. Chandrashekar, A and Gopalakrishnan, M. 2005. ...

Production Planning & Control, 2005

In the context of e-business, companies use purchase cards (P-cards) to order merchandise directl... more In the context of e-business, companies use purchase cards (P-cards) to order merchandise directly from the supplier (or use the web or other e-procurement systems). The card company does the budget control and record keeping. Hence, P-cards are touted as ...

Management Science, 2001

This paper presents a tabu-search heuristic for the capacitated lot-sizing problem (CLSP) with se... more This paper presents a tabu-search heuristic for the capacitated lot-sizing problem (CLSP) with set-up carryover. This production-planning problems allows multiple items to be produced within a time period, and setups for items to be carried over from one period to the next. Two ...