A variable sampling interval run sum chart for monitoring multivariate coefficient of variation

• Dongmei Cui,

  Roles Conceptualization, Formal analysis, Software, Validation, Writing – original draft, Writing – review & editing

  Affiliations School of Business, Hunan International Economics University, Changsha, Hunan, China, School of Mathematical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia

  ⨯
• Michael B. C. Khoo ,

  Roles Conceptualization, Formal analysis, Supervision, Validation

  * E-mail: mkbc@usm.my

  Affiliation School of Mathematical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia

  https://orcid.org/0000-0002-3245-1127

  ⨯
• Sajal Saha,

  Roles Formal analysis, Software, Supervision

  Affiliation Department of Mathematics, International University of Business Agriculture and Technology, Dhaka, Bangladesh

  https://orcid.org/0000-0002-9878-4899

  ⨯
• Zhi Lin Chong,

  Roles Investigation, Writing – review & editing

  Affiliation Department of Electronic Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Kampar, Malaysia

  ⨯
• Shanyu Chua

  Roles Validation, Writing – review & editing

  Affiliation Estek Automation Sdn Bhd, Bayan Lepas, Penang, Malaysia

  ⨯