Prof. (Dr.) Chandra K Jaggi (original) (raw)

Papers by Prof. (Dr.) Chandra K Jaggi

International Journal of Services Operations and Informatics, 2011

In today's technology-driven world, despite of efficient planning of manufacturing system and eme... more In today's technology-driven world, despite of efficient planning of manufacturing system and emergence of sophisticated production methods and control systems; the items produced have some fraction of defectives. However, these defective items can be removed from the lot through a screening process. Thus, the inspection of lot becomes essential, especially when items are deteriorating in nature. Further, in today's uncertain global economy, due to rising inflation there is a consequent decline in the real value of money, which eventually forces the supplier to provide an attractive tradecredit policy to the retailer. Keeping this scenario in mind, an attempt has been made to formulate an inventory policy for a retailer dealing with imperfect quality items of deteriorating nature under inflation and permissible delay in payments. Results have been demonstrated with the help of a numerical example and sensitivity analysis is also presented to provide managerial insights into practice.

Periodic Review Inventory Model with Controllable Lead Time under Service level Constraint where Backorder Rate depends on Protection Interval

International Journal of Inventory Control and Management

In this paper, a periodic review inventory model with controllable lead time under the service le... more In this paper, a periodic review inventory model with controllable lead time under the service level constraint has been examined where backorder rate is depend on the back order discount and the length of the protection interval which is sum of the review period and lead time. Shortages are allowed and partially backlogged. The demand during the protection interval is assumed to be normally distributed. The total cost has been obtained by jointly optimizing the review period, lead time and backorder discount under the effect of known service level. This study not only provides the greater flexibility to the inventory manager to coordinate inventory in more efficient manner but also makes enormous savings in total expected cost.

Optimization of a periodically assessing model with manageable lead time under SLC with back order rebate for deteriorating items

International Journal of System Assurance Engineering and Management

Sustainable production inventory model with greening degree and dual determinants of defective items

Journal of Cleaner Production

Handbook of Research on Promoting Business Process Improvement Through Inventory Control Techniques, 2018

This chapter develops an economic order quantity model for deteriorating items with initial inspe... more This chapter develops an economic order quantity model for deteriorating items with initial inspection, allowable shortage under the condition of permissible delay in payment by fuzzify the demand rate, deterioration rate and inspection parameter of non-defective parameter based on as triangular fuzzy numbers to fit the real word. The total fuzzy cost function has been defuzzified using signed distance and centroid method. Comparison between these two methods has also been discussed. The validity of the model has been established with the help of a hypothetical numerical example.

Strategic decisions in an imperfect quality and inspection scenario under two-stage credit financing with order overlapping approach

Expert Systems with Applications, 2022

Impact of Demonetization on Supply Chain in Indian Context

AIMS International Journal of Management, 2018

Women participation in politics has always been an issue concerning modern-day political experts.... more Women participation in politics has always been an issue concerning modern-day political experts. Traditionally, they played second-fiddle to their male counterparts for no faults of theirs. Even the most-advanced nation, the oldest democracy of the world, namely United States of America (USA), recognized their right to vote after lots of struggle. It is yet to have its first lady President (though it may change in the upcoming Presidential Election of 2016 what with Hillary Clinton claiming the nomination of the Dems). The reason for the same is not very hard to fathom despite the advances made in almost every field. The scenario is similar across every nation in the world. India is no different to the same. Political activities and their relationship with women's participation is something which has not been discussed to great extent in the Indian context, much like other democracies. The general election of 2014 defied this to an extent and acted as a breaking ground for wome...

A Gentle Introduction to the Bayesian Paradigm for Some Inventory Models

Optimal Inventory Control and Management Techniques

Ordering Policies of Deteriorating Items under Permissible Delay in Payments

Journal of the Operational Research Society, 1995

... cost and interest payable on stock held beyond the permissible period, but the interest earne... more ... cost and interest payable on stock held beyond the permissible period, but the interest earned during the ... OT2 The value of T = T1 (say), which minimizes TVC1(T) can be obtained from the ... 0 2 by using some numerical method, such as the Newton-Raphson method, provided ...

Sustainable inventory model for a three-layer supply chain using optimal waste management

International Journal of System Assurance Engineering and Management

Every industrial sector emits carbon emissions during production, which is always a major concern... more Every industrial sector emits carbon emissions during production, which is always a major concern for environmental practitioners. To resolve this, innovative and smart ways are required that are not only cost-effective but also environmentally savvy. Moreover, the production processes are also prone to various imperfections, and thus the production of defectives is quite pragmatic. The handling of such defective products varies from industry to industry and type of products. The present study constructs an inventory model to handle the defective products via a proficient rework strategy that makes the product fit to be sold at the primary price. Here, the demand for the product is assumed to be dependent on the selling price and advertisements. The model also considers the energy usage during the production and the cost of carbon emissions while optimizing the production batch size and selling price. Optimality is proved graphically by using the software Mathematica 11.3.0. A compr...

The underlying goal of JIT philosophy is to eliminate waste, which is possible only through certa... more The underlying goal of JIT philosophy is to eliminate waste, which is possible only through certain measures such as reducing the lead time, crashing of the setup cost, improving the service level etc. All these measures are achievable through an extra investment. The present study investigates the effect of crashing of the lead time and setup cost in periodic review inventory model, where the demand during the protection interval follows the normal distribution under the service level constraint. Numerical example is presented to illustrate the results of the proposed model along with the sensitivity analysis.

A two-warehouse inventory problem for non-instantaneous deteriorating items with constant demand ... more A two-warehouse inventory problem for non-instantaneous deteriorating items with constant demand rate under different dispatching policies is premeditated. While formulating the inventory model for deteriorating items, usually it is assumed that the items start deteriorating as soon as they enter into the warehouse. However, there are numerous products like dry fruits, food grains etc. that have a shelf-life and start deteriorating after a time lag that is termed as non-instantaneous deterioration. Moreover, at times there are situations like eye catching price discount, low cost storage, huge demand etc. and under such a situation one may decide to procure large quantity of the items which would arise the problem of storing. As the capacity of own warehouse is limited, therefore one has to hire another warehouse to store the excess quantity. To incorporate above scenario, a two-warehouse inventory model for non-instantaneous deteriorating item under different dispatching policy i.e...

This paper considers a simple supply chain in which a single supplier sells to several downstream... more This paper considers a simple supply chain in which a single supplier sells to several downstream retailers and he may distinguish various retailers' demand by giving more importance to satisfying some categories of demand than others. The supplier has limited capacity. If the retailer orders exceed available capacity, the supplier allocates capacity using publicly known mechanism. After allocation if the supplier is left with inventory he can reallocate the demand. An algorithm has been developed for reallocation of demand using different allocation mechanism. It has been shown numerically, how reallocation mechanism can benefit the retailers as well as supplier causing higher supply chain profits. Further, we have tried to evaluate whether a retailer should use truth-inducing mechanism or he should use manipulable mechanism to increase his profit. MSC 90B05 RESUMEN Este trabajo considera una cadena simple de abastecimiento en la que un simple suministrador vende a varios inter...

Inventory Models for Imperfect Quality Items: A Two-Decade Review

Advances in Interdisciplinary Research in Engineering and Business Management

Yugoslav Journal of Operations Research, 2020

In this uncertain environment, disaster may happen at any point in time or physical location that... more In this uncertain environment, disaster may happen at any point in time or physical location that may be of the kind earthquake, flood, tornadoes, hurricanes, among others. If any disaster happens, organizations (private or government) start to provide facilities as evacuation and supply of relief commodities in the affected regions. This paper formulates an inventory-relief-chain (IRC) model with the relief supply chain for the distribution of the relief commodity. The results of the model provide the optimal number of intermediate distribution centers and relief centers. However, in the study, every relief center is considered to distribute the relief commodity because in disaster conditions every relief center is inescapable. The model is formulated with a core objective to optimize the total cost of the relief operation. An algorithm is proposed to nd the optimal solution of the proposed model. Furthermore, a numerical analysis is carried out with a numerical example to validate...

Electronic Journal of Applied Statistical Analysis, 2016

In this article, a periodic review inventory model having variable lead time, along with the serv... more In this article, a periodic review inventory model having variable lead time, along with the service level constraint has been discussed. The demand during the protection interval is assumed to follow the Normal distribution. A wide range of expected shortages during the protection interval has been considered, with their corresponding values of safety factor. Keeping this in mind, we have returned to both Ouyang and Chuang (2000) and Liang et al. (2008) model. Further, it has been observed that both the models do not succeed in providing the solution for service level other than 98% and 99%. In the light of this fact, we revisit the solution procedure of both the papers and are able to obtain the result for any level of service. Detail comparative analysis has also been presented.

En un modelo EOQ (tamano economico del lote) es asumido tacitamente que el 100% de los items en u... more En un modelo EOQ (tamano economico del lote) es asumido tacitamente que el 100% de los items en un lote tiene una calidad perfecta. Esto es posible solo bajo situaciones muy ideales, pues practicamente esta asuncion debe ser no cierta. Entonces, la inspeccion del lote es indispensable en todas las organizaciones tanto publicas como privadas. Mas aun, esto juega un rol muy significativo si los productos son deteriorables En este trabajo se ha hecho un intento de formular un modelo de inventario para items deteriorables con calidad imperfecta. La tasa de inspeccion se asume sea mayor que la demanda. Esta asuncion ayuda a cumplimentar la demanda, fuera de los productos que fueron hallados con una calidad perfecta, junto con el proceso de valoracion. Un ejemplo hipotetico es considerado para validar el modelo y los resultados son obtenidos usando Matlab7.0.1. Un analisis comprensible de la sensibilidad es presen tado tambien

Sustainable and flexible production system for a deteriorating item with quality consideration

Int. J. Syst. Assur. Eng. Manag., 2021

Inventory Control of New Products with Price Change Anticipation under Influence of Innovation Diffusion Process

The new product diffusion models such as Bass model and their revised and extended forms have pla... more The new product diffusion models such as Bass model and their revised and extended forms have played a major role in marketing literature because those models have been widely used for forecasting dynamic demand growth in retail service, industrial technology, consumer durable goods, etc. However, the demand pattern of these models has not been recognized by the models developed in the inventory field. The approach of this paper is to develop an inventory model in which the demand of the product follows extended Bass diffusion model by incorporating price in a multiplicative way. The model is illustrated with a numerical example and a comprehensive sensitivity analysis of the optimal solution with respect to different parameters was performed to make the model more effective.

International Journal of Services Operations and Informatics, 2011

In today's technology-driven world, despite of efficient planning of manufacturing system and eme... more In today's technology-driven world, despite of efficient planning of manufacturing system and emergence of sophisticated production methods and control systems; the items produced have some fraction of defectives. However, these defective items can be removed from the lot through a screening process. Thus, the inspection of lot becomes essential, especially when items are deteriorating in nature. Further, in today's uncertain global economy, due to rising inflation there is a consequent decline in the real value of money, which eventually forces the supplier to provide an attractive tradecredit policy to the retailer. Keeping this scenario in mind, an attempt has been made to formulate an inventory policy for a retailer dealing with imperfect quality items of deteriorating nature under inflation and permissible delay in payments. Results have been demonstrated with the help of a numerical example and sensitivity analysis is also presented to provide managerial insights into practice.

Periodic Review Inventory Model with Controllable Lead Time under Service level Constraint where Backorder Rate depends on Protection Interval

International Journal of Inventory Control and Management

In this paper, a periodic review inventory model with controllable lead time under the service le... more In this paper, a periodic review inventory model with controllable lead time under the service level constraint has been examined where backorder rate is depend on the back order discount and the length of the protection interval which is sum of the review period and lead time. Shortages are allowed and partially backlogged. The demand during the protection interval is assumed to be normally distributed. The total cost has been obtained by jointly optimizing the review period, lead time and backorder discount under the effect of known service level. This study not only provides the greater flexibility to the inventory manager to coordinate inventory in more efficient manner but also makes enormous savings in total expected cost.

Optimization of a periodically assessing model with manageable lead time under SLC with back order rebate for deteriorating items

International Journal of System Assurance Engineering and Management

Sustainable production inventory model with greening degree and dual determinants of defective items

Journal of Cleaner Production

Handbook of Research on Promoting Business Process Improvement Through Inventory Control Techniques, 2018

This chapter develops an economic order quantity model for deteriorating items with initial inspe... more This chapter develops an economic order quantity model for deteriorating items with initial inspection, allowable shortage under the condition of permissible delay in payment by fuzzify the demand rate, deterioration rate and inspection parameter of non-defective parameter based on as triangular fuzzy numbers to fit the real word. The total fuzzy cost function has been defuzzified using signed distance and centroid method. Comparison between these two methods has also been discussed. The validity of the model has been established with the help of a hypothetical numerical example.

Strategic decisions in an imperfect quality and inspection scenario under two-stage credit financing with order overlapping approach

Expert Systems with Applications, 2022

Impact of Demonetization on Supply Chain in Indian Context

AIMS International Journal of Management, 2018

Women participation in politics has always been an issue concerning modern-day political experts.... more Women participation in politics has always been an issue concerning modern-day political experts. Traditionally, they played second-fiddle to their male counterparts for no faults of theirs. Even the most-advanced nation, the oldest democracy of the world, namely United States of America (USA), recognized their right to vote after lots of struggle. It is yet to have its first lady President (though it may change in the upcoming Presidential Election of 2016 what with Hillary Clinton claiming the nomination of the Dems). The reason for the same is not very hard to fathom despite the advances made in almost every field. The scenario is similar across every nation in the world. India is no different to the same. Political activities and their relationship with women's participation is something which has not been discussed to great extent in the Indian context, much like other democracies. The general election of 2014 defied this to an extent and acted as a breaking ground for wome...

A Gentle Introduction to the Bayesian Paradigm for Some Inventory Models

Optimal Inventory Control and Management Techniques

Ordering Policies of Deteriorating Items under Permissible Delay in Payments

Journal of the Operational Research Society, 1995

... cost and interest payable on stock held beyond the permissible period, but the interest earne... more ... cost and interest payable on stock held beyond the permissible period, but the interest earned during the ... OT2 The value of T = T1 (say), which minimizes TVC1(T) can be obtained from the ... 0 2 by using some numerical method, such as the Newton-Raphson method, provided ...

Sustainable inventory model for a three-layer supply chain using optimal waste management

International Journal of System Assurance Engineering and Management

Every industrial sector emits carbon emissions during production, which is always a major concern... more Every industrial sector emits carbon emissions during production, which is always a major concern for environmental practitioners. To resolve this, innovative and smart ways are required that are not only cost-effective but also environmentally savvy. Moreover, the production processes are also prone to various imperfections, and thus the production of defectives is quite pragmatic. The handling of such defective products varies from industry to industry and type of products. The present study constructs an inventory model to handle the defective products via a proficient rework strategy that makes the product fit to be sold at the primary price. Here, the demand for the product is assumed to be dependent on the selling price and advertisements. The model also considers the energy usage during the production and the cost of carbon emissions while optimizing the production batch size and selling price. Optimality is proved graphically by using the software Mathematica 11.3.0. A compr...

The underlying goal of JIT philosophy is to eliminate waste, which is possible only through certa... more The underlying goal of JIT philosophy is to eliminate waste, which is possible only through certain measures such as reducing the lead time, crashing of the setup cost, improving the service level etc. All these measures are achievable through an extra investment. The present study investigates the effect of crashing of the lead time and setup cost in periodic review inventory model, where the demand during the protection interval follows the normal distribution under the service level constraint. Numerical example is presented to illustrate the results of the proposed model along with the sensitivity analysis.

A two-warehouse inventory problem for non-instantaneous deteriorating items with constant demand ... more A two-warehouse inventory problem for non-instantaneous deteriorating items with constant demand rate under different dispatching policies is premeditated. While formulating the inventory model for deteriorating items, usually it is assumed that the items start deteriorating as soon as they enter into the warehouse. However, there are numerous products like dry fruits, food grains etc. that have a shelf-life and start deteriorating after a time lag that is termed as non-instantaneous deterioration. Moreover, at times there are situations like eye catching price discount, low cost storage, huge demand etc. and under such a situation one may decide to procure large quantity of the items which would arise the problem of storing. As the capacity of own warehouse is limited, therefore one has to hire another warehouse to store the excess quantity. To incorporate above scenario, a two-warehouse inventory model for non-instantaneous deteriorating item under different dispatching policy i.e...

This paper considers a simple supply chain in which a single supplier sells to several downstream... more This paper considers a simple supply chain in which a single supplier sells to several downstream retailers and he may distinguish various retailers' demand by giving more importance to satisfying some categories of demand than others. The supplier has limited capacity. If the retailer orders exceed available capacity, the supplier allocates capacity using publicly known mechanism. After allocation if the supplier is left with inventory he can reallocate the demand. An algorithm has been developed for reallocation of demand using different allocation mechanism. It has been shown numerically, how reallocation mechanism can benefit the retailers as well as supplier causing higher supply chain profits. Further, we have tried to evaluate whether a retailer should use truth-inducing mechanism or he should use manipulable mechanism to increase his profit. MSC 90B05 RESUMEN Este trabajo considera una cadena simple de abastecimiento en la que un simple suministrador vende a varios inter...

Inventory Models for Imperfect Quality Items: A Two-Decade Review

Advances in Interdisciplinary Research in Engineering and Business Management

Yugoslav Journal of Operations Research, 2020

In this uncertain environment, disaster may happen at any point in time or physical location that... more In this uncertain environment, disaster may happen at any point in time or physical location that may be of the kind earthquake, flood, tornadoes, hurricanes, among others. If any disaster happens, organizations (private or government) start to provide facilities as evacuation and supply of relief commodities in the affected regions. This paper formulates an inventory-relief-chain (IRC) model with the relief supply chain for the distribution of the relief commodity. The results of the model provide the optimal number of intermediate distribution centers and relief centers. However, in the study, every relief center is considered to distribute the relief commodity because in disaster conditions every relief center is inescapable. The model is formulated with a core objective to optimize the total cost of the relief operation. An algorithm is proposed to nd the optimal solution of the proposed model. Furthermore, a numerical analysis is carried out with a numerical example to validate...

Electronic Journal of Applied Statistical Analysis, 2016

In this article, a periodic review inventory model having variable lead time, along with the serv... more In this article, a periodic review inventory model having variable lead time, along with the service level constraint has been discussed. The demand during the protection interval is assumed to follow the Normal distribution. A wide range of expected shortages during the protection interval has been considered, with their corresponding values of safety factor. Keeping this in mind, we have returned to both Ouyang and Chuang (2000) and Liang et al. (2008) model. Further, it has been observed that both the models do not succeed in providing the solution for service level other than 98% and 99%. In the light of this fact, we revisit the solution procedure of both the papers and are able to obtain the result for any level of service. Detail comparative analysis has also been presented.

En un modelo EOQ (tamano economico del lote) es asumido tacitamente que el 100% de los items en u... more En un modelo EOQ (tamano economico del lote) es asumido tacitamente que el 100% de los items en un lote tiene una calidad perfecta. Esto es posible solo bajo situaciones muy ideales, pues practicamente esta asuncion debe ser no cierta. Entonces, la inspeccion del lote es indispensable en todas las organizaciones tanto publicas como privadas. Mas aun, esto juega un rol muy significativo si los productos son deteriorables En este trabajo se ha hecho un intento de formular un modelo de inventario para items deteriorables con calidad imperfecta. La tasa de inspeccion se asume sea mayor que la demanda. Esta asuncion ayuda a cumplimentar la demanda, fuera de los productos que fueron hallados con una calidad perfecta, junto con el proceso de valoracion. Un ejemplo hipotetico es considerado para validar el modelo y los resultados son obtenidos usando Matlab7.0.1. Un analisis comprensible de la sensibilidad es presen tado tambien

Sustainable and flexible production system for a deteriorating item with quality consideration

Int. J. Syst. Assur. Eng. Manag., 2021

Inventory Control of New Products with Price Change Anticipation under Influence of Innovation Diffusion Process

The new product diffusion models such as Bass model and their revised and extended forms have pla... more The new product diffusion models such as Bass model and their revised and extended forms have played a major role in marketing literature because those models have been widely used for forecasting dynamic demand growth in retail service, industrial technology, consumer durable goods, etc. However, the demand pattern of these models has not been recognized by the models developed in the inventory field. The approach of this paper is to develop an inventory model in which the demand of the product follows extended Bass diffusion model by incorporating price in a multiplicative way. The model is illustrated with a numerical example and a comprehensive sensitivity analysis of the optimal solution with respect to different parameters was performed to make the model more effective.