On optimal burn-in procedures - a generalized model. - Ji Hwan Cha (IEEE Trans. Reliab., 2005)

Optimal Workload for a Multi-Tasking k-out-of-n: G Load Sharing System. - Ji Hwan Cha; Hisashi Yamamoto; Won Young Yun (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Sequential Confidence Interval Estimation for System Availability. - Ji Hwan Cha; Sangyeol Lee; Jongwoo Jeon (Qual. Reliab. Eng. Int., 2006)

An extended model for optimal burn-in procedures. - Ji Hwan Cha (IEEE Trans. Reliab., 2006)

A Bayesian Change-Point Analysis for Software Reliability Models. - Seungmin Nam; Ji Hwan Cha; Sinsup Cho (Commun. Stat. Simul. Comput., 2008)

Optimal Burn-in for Minimizing Total Warranty Cost. - Ji Hwan Cha; Hisashi Yamamoto; Won Young Yun (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Burn-in by environmental shocks for two ordered subpopulations. - Ji Hwan Cha; Maxim Finkelstein (Eur. J. Oper. Res., 2010)

An extended stochastic failure model for a system subject to random shocks. - Ji Hwan Cha; Eui Yong Lee (Oper. Res. Lett., 2010)

Optimal design of a general warm standby system. - Won Young Yun; Ji Hwan Cha (Reliab. Eng. Syst. Saf., 2010)

Stochastically Ordered Subpopulations and Optimal Burn-In Procedure. - Ji Hwan Cha; Maxim Finkelstein (IEEE Trans. Reliab., 2010)

Comparison of combined stochastic risk processes and its applications. - Ji Hwan Cha (Eur. J. Oper. Res., 2011)

Burn-in and the performance quality measures in heterogeneous populations. - Ji Hwan Cha; Maxim Finkelstein (Eur. J. Oper. Res., 2011)

Burn-in for Systems Operating in a Shock Environment. - Ji Hwan Cha; Maxim Finkelstein (IEEE Trans. Reliab., 2011)

A Note on the Failure Rates in Finite Mixed Populations. - Ji Hwan Cha; Massimiliano Giorgio (J. Appl. Probab., 2012)

Stochastic analysis of preventive maintenance in heterogeneous populations. - Ji Hwan Cha; Maxim Finkelstein (Oper. Res. Lett., 2012)

On Stochastic Predictions of Failure Processes Under Population Heterogeneity. - Ji Hwan Cha (J. Appl. Probab., 2013)

On history-dependent shock models. - Ji Hwan Cha; Maxim Finkelstein (Oper. Res. Lett., 2013)

The failure rate dynamics in heterogeneous populations. - Ji Hwan Cha; Maxim Finkelstein (Reliab. Eng. Syst. Saf., 2013)

Results for Burn-in of Systems Under External Shocks. - Ji Hwan Cha; Maxim Finkelstein (IEEE Trans. Reliab., 2013)

Survival of systems with protection subject to two types of external attacks. - Ji Hwan Cha; Maxim Finkelstein; Francois Marais (Ann. Oper. Res., 2014)

Stochastic Modeling for Environmental Stress Screening. - Ji Hwan Cha; Maxim Finkelstein (J. Appl. Probab., 2014)

Stochastic comparison of multivariate conditionally dependent mixtures. - Francisco Germán Badía; Carmen Sangüesa; Ji Hwan Cha (J. Multivar. Anal., 2014)

On construction of general classes of bivariate distributions. - Hyunju Lee; Ji Hwan Cha (J. Multivar. Anal., 2014)

On some conditional characteristics of hazard rate processes induced by external shocks. - Ji Hwan Cha; Maxim Finkelstein (Oper. Res. Lett., 2014)

Some notes on unobserved parameters (frailties) in reliability modeling. - Ji Hwan Cha; Maxim Finkelstein (Reliab. Eng. Syst. Saf., 2014)

A Stochastic Failure Model with Dependent Competing Risks and its Applications to Condition-Based Maintenance. - Ji Hwan Cha; Inma T. Castro (J. Appl. Probab., 2015)

Construction of two new general classes of bivariate distributions based on stochastic orders. - Hyunju Lee; Ji Hwan Cha (J. Multivar. Anal., 2015)

Environmental stress screening modelling, analysis and optimization. - Ji Hwan Cha; Maxim Finkelstein (Reliab. Eng. Syst. Saf., 2015)

New shock models based on the generalized Polya process. - Ji Hwan Cha; Maxim Finkelstein (Eur. J. Oper. Res., 2016)

Optimal burn-in procedure for mixed populations based on the device degradation process history. - Ji Hwan Cha; Gianpaolo Pulcini (Eur. J. Oper. Res., 2016)

New stochastic models for preventive maintenance and maintenance optimization. - Hyunju Lee; Ji Hwan Cha (Eur. J. Oper. Res., 2016)

On information-based warranty policy for repairable products from heterogeneous population. - Hyunju Lee; Ji Hwan Cha; Maxim Finkelstein (Eur. J. Oper. Res., 2016)

Point process approach to modeling and analysis of general cascading failure models. - Hyunju Lee; Ji Hwan Cha (J. Appl. Probab., 2016)

A Dependent Competing Risks Model for Technological Units Subject to Degradation Phenomena and Catastrophic Failures. - Ji Hwan Cha; Gianpaolo Pulcini (Qual. Reliab. Eng. Int., 2016)

On some properties of shock processes in a 'natural' scale. - Ji Hwan Cha; Maxim Finkelstein (Reliab. Eng. Syst. Saf., 2016)

Optimal Replacement of Heterogeneous Items With Minimal Repairs. - Ji Hwan Cha (IEEE Trans. Reliab., 2016)

Optimal Long-Run Imperfect Maintenance With Asymptotic Virtual Age. - Ji Hwan Cha; Maxim Finkelstein (IEEE Trans. Reliab., 2016)

On Ageing Concepts for Repairable Items From Heterogeneous Populations. - Ji Hwan Cha; Maxim Finkelstein (IEEE Trans. Reliab., 2016)

Maintenance Policy for a System With Stochastically Dependent Failure Modes With Shock-Accumulation Effect. - Ji Hwan Cha; Carmen Sangüesa; Inmaculada Torres Castro (IEEE Trans. Reliab., 2016)

On optimal grouping and stochastic comparisons for heterogeneous items. - Nil Kamal Hazra; Maxim Finkelstein; Ji Hwan Cha (J. Multivar. Anal., 2017)

Modeling Discrete Bivariate Data with Applications to Failure and Count Data. - Hyunju Lee; Ji Hwan Cha; Gianpaolo Pulcini (Qual. Reliab. Eng. Int., 2017)

On preventive maintenance of systems with lifetimes dependent on a random shock process. - Ji Hwan Cha; Maxim Finkelstein; Gregory Levitin (Reliab. Eng. Syst. Saf., 2017)

Bivariate preventive maintenance of systems with lifetimes dependent on a random shock process. - Ji Hwan Cha; Maxim Finkelstein; Gregory Levitin (Eur. J. Oper. Res., 2018)

Optimal mission abort policy for partially repairable heterogeneous systems. - Ji Hwan Cha; Maxim Finkelstein; Gregory Levitin (Eur. J. Oper. Res., 2018)

Univariate and multivariate stochastic comparisons and ageing properties of the generalized Pólya process. - Francisco Germán Badía; Carmen Sangüesa; Ji Hwan Cha (J. Appl. Probab., 2018)

On optimal operational sequence of components in a warm standby system. - Maxim Finkelstein; Nil Kamal Hazra; Ji Hwan Cha (J. Appl. Probab., 2018)

Stochastic comparisons and multivariate dependence for the epoch times of trend renewal processes. - Francisco Germán Badía; Carmen Sangüesa; Ji Hwan Cha (J. Multivar. Anal., 2018)

On preventive maintenance under different assumptions on the failure/repair processes. - Ji Hwan Cha; Maxim Finkelstein (Qual. Reliab. Eng. Int., 2018)

On optimal replacement of systems with failure rates described by a random jump process. - Ji Hwan Cha; Maxim Finkelstein; Gregory Levitin (Qual. Reliab. Eng. Int., 2018)

Optimal replacement policy under a general failure and repair model: Minimal versus worse than old repair. - Francisco Germán Badía; María Dolores Berrade; Ji Hwan Cha; Hyunju Lee (Reliab. Eng. Syst. Saf., 2018)

Stochastic modeling for systems with delayed failures. - Ji Hwan Cha; Maxim Finkelstein (Reliab. Eng. Syst. Saf., 2019)

On a new age-replacement policy for items with observed stochastic degradation. - Maxim Finkelstein; Ji Hwan Cha; Gregory Levitin (Qual. Reliab. Eng. Int., 2020)

Optimal warranty policy with inspection for heterogeneous, stochastically degrading items. - Ji Hwan Cha; Maxim Finkelstein; Gregory Levitin (Eur. J. Oper. Res., 2021)

Optimal preventive switching of components in degrading systems. - Maxim Finkelstein; Ji Hwan Cha; Amy Langston (Reliab. Eng. Syst. Saf., 2022)

Improving classical optimal age-replacement policies for degrading items. - Maxim Finkelstein; Ji Hwan Cha; Amy Langston (Reliab. Eng. Syst. Saf., 2023)

Optimal preventive maintenance strategy for populations of systems that generate outputs. - Maxim Finkelstein; Ji Hwan Cha; Tim Bedford (Reliab. Eng. Syst. Saf., 2023)

Preventive maintenance for the constrained multi-attempt minimal repair. - Ji Hwan Cha; Maxim Finkelstein (Reliab. Eng. Syst. Saf., 2024)

Preservation of the log concavity by Bernstein operator with an application to ageing properties of a coherent system. - Francisco Germán Badía; Ji Hwan Cha; H. Lee; Carmen Sangüesa (J. Comput. Appl. Math., 2024)

Development of a new general class of bivariate distributions based on reversed hazard rate order. - Na Young Yoo; Hyunju Lee; Ji Hwan Cha (Comput. Stat. Data Anal., 2025)

Is our mission profitable: The cost-effectiveness curve with a possibility of a mission abort. - Maxim Finkelstein; Ji Hwan Cha (Reliab. Eng. Syst. Saf., 2025)