Foreign Direct Investment or Outsourcing: A Supply Chain Decision Model (2009)
Strategically deciding between various global expansion alternatives at the various stages of the supply chain of a large multinational firm is a very challenging problem. The firm ′ s supply chain...
Inspection Allocation in Manufacturin Systems Using Stochastic Search Techni (2008)
N. Viswanadham, Shashi M. Sharma, Mukesh Taneja
Abstract-Quality is the hallmark of a competitive product. It is necessary to use inspection stations to check product quality and process performance. In this paper, we are concerned with the...
Indices, Variance Pool Allocation (VPA), Generalized Motorola Six Sigma (GMoSS) Concept (2008)
Cycle Time Compression, D. Garg, Y. Narahari, N. Viswanadham
SUPPLY chains provide the backbone for manufacturing, service, and E-business companies. The supply chain process is a complex, composite business process comprising a hierarchy of different levels...
Sensitivity Analysis of Failure-Prone Flexible Manufacturing Systems (2008)
V. Gopalakrishna, N. Viswanadham, Krishna R. Pattipati
Performance evaluation of failure-prone manufac-turing systems is of significant practical interest. In this paper, we consider the parametric sensitivity anal-ysis of manufacturing systems producing...
A CONCEPTUAL AND ANALYTICAL FRAMEWORK FOR THE MANAGEMENT OF RISK IN SUPPLY CHAINS (2008)
Roshan Gaonkar, N. Viswanadham
In this paper, we develop a framework to classify supply chain risk management problems and approaches for the solution of these problems. We argue that risk management problems need to be handled at...
Lead Time Models for Analysis of Supply Chain Networks (2007)
Supply chains are formed out of complex interactions amongst several enterprises whose aim is to produce and transport goods so that customer desired products are sold at various retail outlets....
Achieving sharp deliveries in supply chains through variance pool allocation (2006)
Garg, D, Narahari, Y, Viswanadham, N
Variability reduction and business process synchronization are acknowledged as key to achieving sharp and timely deliveries in supply chain networks. In this paper, we develop an approach that...
Achieving sharp deliveries in supply chains through variance pool allocation (2006)
Garg, D, Narahari, Y, Viswanadham, N
Variability reduction and business process synchronization are acknowledged as key to achieving sharp and timely deliveries in supply chain networks. In this paper, we develop an approach that...
Design of six sigma supply chains (2004)
Garg, D, Narahari, Y, Viswanadham, N
Variability reduction and business-process synchronization are acknowledged as keys to achieving sharp and timely deliveries in supply-chain networks. In this paper, we introduce a new notion, which...
Design of six sigma supply chains (2004)
Garg, D, Narahari, Y, Viswanadham, N
Variability reduction and business-process synchronization are acknowledged as keys to achieving sharp and timely deliveries in supply-chain networks. In this paper, we introduce a new notion, which...
A New Approach to Achieving Sharp and Timely Deliveries in Supply Chain Networks (2003)
Garg, Dinesh, Narahari, Y, Viswanadham, N
In this paper, we come up with an innovative approach through which variability reduction and synchronization can be realized in supply chains. The approach developed is founded on a connection...
Design of Six Sigma Supply Chains (2003)
Garg, Dinesh, Narahari, Y, Viswanadham, N
Variability reduction and business pmcess synchronization are achowledged as key to achieving sharp and timely deliveries in supply chain networks. In this paper, we introduce a new notion, which we...
A New Approach to Achieving Sharp and Timely Deliveries in Supply Chain Networks (2003)
Garg, Dinesh, Narahari, Y, Viswanadham, N
In this paper, we come up with an innovative approach through which variability reduction and synchronization can be realized in supply chains. The approach developed is founded on a connection...
Design of Six Sigma Supply Chains (2003)
Garg, Dinesh, Narahari, Y, Viswanadham, N
Variability reduction and business pmcess synchronization are achowledged as key to achieving sharp and timely deliveries in supply chain networks. In this paper, we introduce a new notion, which we...
Achieving Sharp Deliveries in Supply Chains Through Variance Pool Allocation (2002)
Garg, Dinesh, Narahari, Y, Viswanadham, N
In this paper, our objective is to come up with a sound methodology to design supply chains with outstanding delivery performance. As the first step towards this objective, we consider supply chains...
Achieving Sharp Deliveries in Supply Chains Through Variance Pool Allocation (2002)
Garg, Dinesh, Narahari, Y, Viswanadham, N
In this paper, our objective is to come up with a sound methodology to design supply chains with outstanding delivery performance. As the first step towards this objective, we consider supply chains...
Achieving sharp deliveries in supply chains through variance pool allocation (2002)
D. Garg, Y. Narahari, N. Viswanadham
Variability reduction and business process synchronization are acknowledged as key to achieving sharp and timely deliveries in supply chain networks. In this paper, we develop an innovative approach...
Achieving sharp deliveries in supply chains through variance pool allocation (2002)
D. Garg, Y. Narahari, N. Viswanadham
Variability reduction and business process synchronization are acknowledged as key to achieving sharp and timely deliveries in supply chain networks. In this paper, we develop an approach that...
Achieving Sharp Deliveries in Supply Chains through Variance Pool Allocation (2002)
Dinesh Garg, Y. Narahari, N. Viswanadham
In this paper, our objective is to come up with a sound methodology to design supply chains with outstanding delivery performance. As the first step towards this objective, we consider supply chains...
Performance analysis and design of supply chains: a Petri net approach (2000)
Viswanadham, N, Raghavan, Srinivasa NR
In this paper, we investigated a dynamic modelling technique for analysing supply chain networks using generalised stochastic Petri nets (GSPNs). The customer order arrival process is assumed to be...
Performance analysis and design of supply chains: a Petri net approach (2000)
Viswanadham, N, Raghavan, Srinivasa NR
In this paper, we investigated a dynamic modelling technique for analysing supply chain networks using generalised stochastic Petri nets (GSPNs). The customer order arrival process is assumed to be...
Design of Synchronized Supply Chains: A Six Sigma Tolerancing Approach (2000)
Narahari, Y, Viswanadham, N, Bhattacharya, R
A supply chain network can be viewed as a network of facilities in which a customer order will flow through internal business processes such as procurement, production, and transportation, ultimately...
Design of Synchronized Supply Chains: A Six Sigma Tolerancing Approach (2000)
Narahari, Y, Viswanadham, N, Bhattacharya, R
A supply chain network can be viewed as a network of facilities in which a customer order will flow through internal business processes such as procurement, production, and transportation, ultimately...
Chemical Supply Chains Supply Chain Mapping and Tool Development (2000)
A National, Vate John Vande, Reveliotis Spyros, Karimi I. A, Srinivasan R, Viswanadham N, ...
Performance Analysis of Supply Chain Networks using Petri nets (1999)
Raghavan, Srinivasa NR, Viswanadham, N
In this paper we investigate dynamic modeling techniques for analyzing supply chain networks using generalized stochastic Petri nets (GSPN). The customer order arrival process is assumed to be...
Performance Analysis of Supply Chain Networks using Petri nets (1999)
Raghavan, Srinivasa NR, Viswanadham, N
In this paper we investigate dynamic modeling techniques for analyzing supply chain networks using generalized stochastic Petri nets (GSPN). The customer order arrival process is assumed to be...
Fault detection and isolation in dynamical systems: A frequency domain approach (1997)
In this paper, we formulate the failure detection and isolation problem in frequency domain which will answer the following questions in a natural way: (i) How do we determine the minimum length of...
Inspection Allocation in Manufacturing Systems Using Stochastic Search Techniques (1996)
Viswanadham, N, Sharma, Shashi M, Taneja, Mukesh
Quality is the hallmark of a competitive product. It is necessary to use inspection stations to check product quality and process performance. In this paper, the authors are concerned with the...
Inspection Allocation in Manufacturing Systems Using Stochastic Search Techniques (1996)
Viswanadham, N, Sharma, Shashi M, Taneja, Mukesh
Quality is the hallmark of a competitive product. It is necessary to use inspection stations to check product quality and process performance. In this paper, the authors are concerned with the...
Performability Studies of Automated Manufacturing Systems with Multiple Part Types (1995)
Viswanadham, N, Pattipati, KR, Gopalakrishna, V
In this paper, we consider the transient performance analysis of failure-prone manufacturing systems producing multiple part types. We decompose the exact monolithic model into (a) slower time scale...
Performability Studies of Automated Manufacturing Systems with Multiple Part Types (1995)
Viswanadham, N, Pattipati, KR, Gopalakrishna, V
In this paper, we consider the transient performance analysis of failure-prone manufacturing systems producing multiple part types. We decompose the exact monolithic model into (a) slower time scale...
Simulation based performability analysis of flexible manufacturing systems (1995)
Gopalakrishna, V, Viswanadham, N
We describe a Petri net based simulator, developed for the composite performance-reliability analysis of manufacturing systems. We also study the simulation based on time scale decomposition and...
Simulated annealing approach to group technology (1995)
We use the simulated annealing approach to solve the group technology (GT) problem. It is well known that this problem belongs to the class of NP complete nonlinear integer programming problems....
Simulation based performability analysis of flexible manufacturing systems (1995)
Gopalakrishna, V, Viswanadham, N
We describe a Petri net based simulator, developed for the composite performance-reliability analysis of manufacturing systems. We also study the simulation based on time scale decomposition and...
Simulated annealing approach to group technology (1995)
We use the simulated annealing approach to solve the group technology (GT) problem. It is well known that this problem belongs to the class of NP complete nonlinear integer programming problems....
Transient Analysis of Manufacturing Systems Performance (1994)
Studies in performance evaluation of automated manufacturing systems, using simulation or analytical models,have always emphasized steady-state or equilibrium performance in preference to transient...
Composite Performance-Dependability Analysis of Cellular Manufacturing Systems (1994)
This paper deals with the transient analysis of manufacturing systems in the presence of failures and repairs. The exact model is decomposed into: 1) a structure state process, modeling the failure...
Transient Analysis of Manufacturing Systems Performance (1994)
Studies in performance evaluation of automated manufacturing systems, using simulation or analytical models,have always emphasized steady-state or equilibrium performance in preference to transient...
Composite Performance-Dependability Analysis of Cellular Manufacturing Systems (1994)
This paper deals with the transient analysis of manufacturing systems in the presence of failures and repairs. The exact model is decomposed into: 1) a structure state process, modeling the failure...
Inspection Allocation in Manufacturing Systems: A Genetic Algorithm Approach (1994)
In this paper, we are concerned with the problem of location of inspection centers in a multistage manufacturing system. A Genetic algorithm based approach is developed to determine the location of...
Sensitivity Analysis of Failure-prone Fexible Manufacturing Systems (1994)
Gopalakrishna, V, Viswanadham, N, Pattipati, Krishna R
Performance evaluation of failure-prone manufacturing systems is of significant practical interest. In this paper, the authors consider the parametric sensitivity analysis of manufacturing systems...
Sensitivity Analysis of Failure-prone Flexible Manufacturing Systems (1994)
Gopalakrishna, V, Viswanadham, N, Pattipati, KR
Performance evaluation of failure-prone manufacturing systems is of significant practical interest. In this paper, the authors consider the parametric sensitivity analysis of manufacturing systems...
Inspection Allocation in Manufacturing Systems: A Genetic Algorithm Approach (1994)
In this paper, we are concerned with the problem of location of inspection centers in a multistage manufacturing system. A Genetic algorithm based approach is developed to determine the location of...
Sensitivity Analysis of Failure-prone Fexible Manufacturing Systems (1994)
Gopalakrishna, V, Viswanadham, N, Pattipati, Krishna R
Performance evaluation of failure-prone manufacturing systems is of significant practical interest. In this paper, the authors consider the parametric sensitivity analysis of manufacturing systems...
Sensitivity Analysis of Failure-prone Flexible Manufacturing Systems (1994)
Gopalakrishna, V, Viswanadham, N, Pattipati, KR
Performance evaluation of failure-prone manufacturing systems is of significant practical interest. In this paper, the authors consider the parametric sensitivity analysis of manufacturing systems...
Transient analysis of manufacturing system performance (1994)
Y. Narahari, Y. Narahari, N. Viswanadham, N. Viswanadham
Studies in performance evaluation of automated manufacturing systems, us. ing simulation or analytical models, have always emphasized steady-state or equilibrium performance in preference to...
Fault diagnosis using signed digraphs: a neural network approach (1991)
The problem of locating the origin of failure in a dynamical system using signed digraphs is of exponential complexity. It is therefore attractive to use the parallel architecture of a neural network...
Fault diagnosis using signed digraphs: a neural network approach (1991)
The problem of locating the origin of failure in a dynamical system using signed digraphs is of exponential complexity. It is therefore attractive to use the parallel architecture of a neural network...
Viswanadham, N, Narahari, Y, Johnson, Timothy L
Deadlocks constitute an important issue to be addressed in the design and operation of flexible manufacturing systems (FMSs). In this paper, we show that prevention and avoidance of FMS deadlocks can...
Stochastic analysis of versatile workcentres (1990)
We analyse the system consisting of a highly capable workcentre, which processes a variety of part types, using queueing models. The various part types produced by the system have distinct arrival...
Integrated analytical models for flexible manufacturing systems (1990)
Narahari, Y, Viswanadham, N, Meenakshisundaram, CR, Rao, Hanumantha P
Product form queueing networks (PFQN) and generalized stochastic Petri nets (GSPN) have emerged as the principal performance modelling tools for flexible manufacturing systems (FMS). In this paper,...
Markovian models for deadlock analysis in automated manufacturing systems (1990)
Narahari, Y, Viswanadham, N, Prasad, Krishna KR
Deadlocks constitute a major issue in the design and operation of discrete event systems. In automated manufacturing systems, deadlocks assume even greater importance in view of the automated...
Viswanadham, N, Narahari, Y, Johnson, Timothy L
Deadlocks constitute an important issue to be addressed in the design and operation of flexible manufacturing systems (FMSs). In this paper, we show that prevention and avoidance of FMS deadlocks can...
Fault Diagnosis in Multirate Sampled Data Systems (1990)
In this paper we present three new schemes for sensor and actuator fault diagnosis for linear time-invariant systems: multirate parity-space techniques, multirate observers, and multirate detection...
Performance Analysis of AutoMated Manufacturing Systems With Blocking And Deadlock (1990)
Viswanadham, N, Johnson, TL, Narahari, Y
The flow of multiple concurrent jobs in an automated manufacturing system (AMS), all competing for a finite set of resources, often leads to a deadlock situation. In this paper, we develop Petri net...
Stochastic analysis of versatile workcentres (1990)
We analyse the system consisting of a highly capable workcentre, which processes a variety of part types, using queueing models. The various part types produced by the system have distinct arrival...
Integrated analytical models for flexible manufacturing systems (1990)
Narahari, Y, Viswanadham, N, Meenakshisundaram, CR, Rao, Hanumantha P
Product form queueing networks (PFQN) and generalized stochastic Petri nets (GSPN) have emerged as the principal performance modelling tools for flexible manufacturing systems (FMS). In this paper,...
Markovian models for deadlock analysis in automated manufacturing systems (1990)
Narahari, Y, Viswanadham, N, Prasad, Krishna KR
Deadlocks constitute a major issue in the design and operation of discrete event systems. In automated manufacturing systems, deadlocks assume even greater importance in view of the automated...
Fault Diagnosis in Multirate Sampled Data Systems (1990)
In this paper we present three new schemes for sensor and actuator fault diagnosis for linear time-invariant systems: multirate parity-space techniques, multirate observers, and multirate detection...
Performance Analysis of AutoMated Manufacturing Systems With Blocking And Deadlock (1990)
Viswanadham, N, Johnson, TL, Narahari, Y
The flow of multiple concurrent jobs in an automated manufacturing system (AMS), all competing for a finite set of resources, often leads to a deadlock situation. In this paper, we develop Petri net...
Performance evaluation of cellular flexible manufacturing systems: a decomposition approach (1990)
In a cellular flexible manufacturing system (CMS) a vast majority of the part types manufactured by the system require machining on a single cell only. However a few part types (called `rare' parts)...
Fault Diagnosis in Multirate Sampled Data Systems (1990)
In this paper we present three new schemes for sensor and actuator fault diagnosis for linear time-invariant systems: multirate parity-space techniques, multirate observers, and multirate detection...
Performance evaluation of cellular flexible manufacturing systems: a decomposition approach (1989)
In a cellular flexible manufacturing system (CMS) a vast majority of the part types manufactured by the system require machining on a single cell only. However a few part types (called `rare' parts)...
Reliable stabilization using a multi-controller configuration (1985)
Given a plant P, we consider the problem of designing a pair of controllers C1 and C2 such that their sum stabilizes P, and in addition, each of them also stabilizes P should the other one fail. This...
Algebraic characterization of decentralized fixed modes (1983)
An input-output, frequency-domain characterization of decentralized fixed modes is given in this paper, using only standard block-diagram algebra, well-known determinantal expansions and the...
Hierarchical Control of an Ammonia Reactor (1983)
Patnaik, LM, Viswanadham, N, Sarma, IG
An approach is presented for hierarchical control of an ammonia reactor, which is a key unit process in a nitrogen fertilizer complex. The aim of the control system is to ensure safe operation of the...
Algebraic design techniques for reliable stabilization (1982)
In this paper we study two problems in feedback stabilization. The first is the simultaneous stabilization problem, which can be stated as follows. Given plantsG_{0}, G_{1},..., G_{l}, does there...
Decentralized Control of Interconnected Dynamical Systems (1982)
Ramakrishna, A, Viswanadham, N
In this paper we consider the decentralized stabilization problem for a class of large systems formed by the dynamic interconnection of several multivariable systems. For this structured class of...
Decentralized Control of Interconnected Dynamical Systems (1982)
Ramakrishna, A, Viswanadham, N
In this paper we consider the decentralized stabilization problem for a class of large systems formed by the dynamic interconnection of several multivariable systems. For this structured class of...
Design of Multiloop Controllers for an Ammonia Reactor (1981)
Patnaik, Lalit M, Viswanadham, N, Sarma, Isukapalli G
The specific objective of this paper is to develop multiloop controllers that would achieve asymptotic regulation in the presence of parameter variations and disturbance inputs for a tubular reactor...
Steady state optimization of an ammonia reactor (1980)
Patnaik, LM, Viswanadham, N, Sarma, IG
A hybrid simulation technique for identification and steady state optimization of a tubular reactor used in ammonia synthesis is presented. The parameter identification program finds the catalyst...
Computer Control Algorithms for a Tubular Ammonia Reactor (1980)
Patnaik, LM, Viswanadham, N, Sarma, Isukapalli G
The specific objective of this paper is to develop direct digital control strategies for an ammonia reactor using the quadratic regulator theory and compare the performance of the resultant control...
Computer Control Algorithms for a Tubular Ammonia Reactor (1980)
Patnaik, LM, Viswanadham, N, Sarma, Isukapalli G
The specific objective of this paper is to develop direct digital control strategies for an ammonia reactor using the quadratic regulator theory and compare the performance of the resultant control...
A Parallel Processor for Real-Time Speech Signal Processing (1979)
Ashajayanthi, AV, Rajaram, S, Viswanadham, N
This paper describes the structure of a parallel processing system, primarily suitable for real-time Linear Prediction (LP) analysis and synthesis of speech signals. This system employs specially...
A Parallel Processor for Real-Time Speech Signal Processing (1979)
Ashajayanthi, AV, Rajaram, S, Viswanadham, N
This paper describes the structure of a parallel processing system, primarily suitable for real-time Linear Prediction (LP) analysis and synthesis of speech signals. This system employs specially...