valentina niño - Academia.edu (original) (raw)
Papers by valentina niño
Multicriteria decision making presents several challenges for researchers. These include selectin... more Multicriteria decision making presents several challenges for researchers. These include selecting a technique that will produce accurate results but not require too much time or resources. Researchers have been comparing different techniques for several years, though a comprehensive study of using many different techniques for the same set of problems is relatively new. Additionally, knowing if the difference in scores between alternatives is significant or not presents another challenge. The use of confidence intervals has recently been employed by researchers to examine whether results are actually statistically different from one another. This study uses 21 different scaling-weighting combinations and confidence intervals on six different decision-making problems to measure their ability to produce unambiguous results. Linear normalization as a scaling technique tends to be the best at identifying one or two clear winners while avoiding complete ambiguity. Despite the variety of combinations used, several common themes emerge across the decision problems.
2016 Winter Simulation Conference (WSC), 2016
Surgery scheduling has received considerable attention in recent years. Block schedules, in which... more Surgery scheduling has received considerable attention in recent years. Block schedules, in which surgeon groups utilize the OR for whatever surgeries they have scheduled for the day, present additional challenges to schedulers. While mean operation times are often used as the primary factor in scheduling strategies, the variability of these operations is not. Recent research suggests that sequencing surgeries based on their variation may decrease the number of late surgery starts. This article builds upon this emerging methodology of variability-oriented sequencing rules for block schedules. Discrete event simulation was used to examine the effectiveness of different sequencing algorithms in reducing the number of behind schedule surgeries and their magnitude. The number and magnitude of tardy surgeries and the patient waiting time were significantly improved by an average of 40% with the proposed scheduling strategies. Additional simulations explored several variations of the variability-based scheduling methodology.
International Journal of Industrial Ergonomics, 2020
Work in healthcare facilities has been categorized as a high-risk job for developing Work-Related... more Work in healthcare facilities has been categorized as a high-risk job for developing Work-Related Musculoskeletal Disorders (WMSDs). Little attention has been given to the Sterile Processing Department (SPD) employees who are exposed to both mentally and physically demanding conditions, factors that may impose an elevated risk in the development of WMSDs. Previous studies have shown that WMSDs can be a result of complex interactions between physical, psychosocial, biological, and individual characteristics. However, the evidence of specific associations is still inconclusive. The objective of this study was to determine if the perception of mental workload causes workers to adopt more risky body postures. The study was carried out in four phases: 1) identification of musculoskeletal disorders using customized Nordic questionnaires, 2) ergonomic assessment of SPD using REBA method, 3) mental workload assessment of SPD using NASA-TLX, and 4) interaction between physical (postural risk) and mental workload through the performance of a task at two different levels of workload conducted through a controlled experiment. The findings indicate that increases in REBA scores and NASA-TLX indices were associated with days and conditions with higher workloads. Results showed evidence that increments on mental workload are related to worsening postures, increasing the risk of developing musculoskeletal disorders. These results serve to raise awareness and warn employees about the need to pause and analyze the way they perform their duties under high levels of workload in an attempt to reduce WMSDs risk in healthcare sector employees.
Resumen es: Los municipios Rafael Urdaneta y Junin del estado Tachira, poseen potencialidades pro... more Resumen es: Los municipios Rafael Urdaneta y Junin del estado Tachira, poseen potencialidades productivas que requieren una orientacion estrategica para su desar...
The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive poten... more The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive potentialities that require a strategic orientation for its sustainable development. The purpose of this research is to define the municipal vision and mission, as well as the potential development axis, that is considered a key input for the design and execution of local development proposals. Using the participative research method, based on workshops that use the Nominal Group Technique, we established the vision of the municipalities and the mission of the organizations involved in the local administration, necessary for the determination of the axis of potential development .
The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive poten... more The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive potentialities that require a strategic orientation for its sustainable development. The purpose of this research is to define the municipal vision and mission, as well as the potential development axis, that is considered a key input for the design and execution of local development proposals. Using the participative research method, based on workshops that use the Nominal Group Technique, we established the vision of the municipalities and the mission of the organizations involved in the local administration, necessary for the determination of the axis of potential development .
Multicriteria decision making presents several challenges for researchers. These include selectin... more Multicriteria decision making presents several challenges for researchers. These include selecting a technique that will produce accurate results but not require too much time or resources. Researchers have been comparing different techniques for several years, though a comprehensive study of using many different techniques for the same set of problems is relatively new. Additionally, knowing if the difference in scores between alternatives is significant or not presents another challenge. The use of confidence intervals has recently been employed by researchers to examine whether results are actually statistically different from one another. This study uses 21 different scaling-weighting combinations and confidence intervals on six different decision-making problems to measure their ability to produce unambiguous results. Linear normalization as a scaling technique tends to be the best at identifying one or two clear winners while avoiding complete ambiguity. Despite the variety of combinations used, several common themes emerge across the decision problems.
2016 Winter Simulation Conference (WSC), 2016
Surgery scheduling has received considerable attention in recent years. Block schedules, in which... more Surgery scheduling has received considerable attention in recent years. Block schedules, in which surgeon groups utilize the OR for whatever surgeries they have scheduled for the day, present additional challenges to schedulers. While mean operation times are often used as the primary factor in scheduling strategies, the variability of these operations is not. Recent research suggests that sequencing surgeries based on their variation may decrease the number of late surgery starts. This article builds upon this emerging methodology of variability-oriented sequencing rules for block schedules. Discrete event simulation was used to examine the effectiveness of different sequencing algorithms in reducing the number of behind schedule surgeries and their magnitude. The number and magnitude of tardy surgeries and the patient waiting time were significantly improved by an average of 40% with the proposed scheduling strategies. Additional simulations explored several variations of the variability-based scheduling methodology.
International Journal of Industrial Ergonomics, 2020
Work in healthcare facilities has been categorized as a high-risk job for developing Work-Related... more Work in healthcare facilities has been categorized as a high-risk job for developing Work-Related Musculoskeletal Disorders (WMSDs). Little attention has been given to the Sterile Processing Department (SPD) employees who are exposed to both mentally and physically demanding conditions, factors that may impose an elevated risk in the development of WMSDs. Previous studies have shown that WMSDs can be a result of complex interactions between physical, psychosocial, biological, and individual characteristics. However, the evidence of specific associations is still inconclusive. The objective of this study was to determine if the perception of mental workload causes workers to adopt more risky body postures. The study was carried out in four phases: 1) identification of musculoskeletal disorders using customized Nordic questionnaires, 2) ergonomic assessment of SPD using REBA method, 3) mental workload assessment of SPD using NASA-TLX, and 4) interaction between physical (postural risk) and mental workload through the performance of a task at two different levels of workload conducted through a controlled experiment. The findings indicate that increases in REBA scores and NASA-TLX indices were associated with days and conditions with higher workloads. Results showed evidence that increments on mental workload are related to worsening postures, increasing the risk of developing musculoskeletal disorders. These results serve to raise awareness and warn employees about the need to pause and analyze the way they perform their duties under high levels of workload in an attempt to reduce WMSDs risk in healthcare sector employees.
Resumen es: Los municipios Rafael Urdaneta y Junin del estado Tachira, poseen potencialidades pro... more Resumen es: Los municipios Rafael Urdaneta y Junin del estado Tachira, poseen potencialidades productivas que requieren una orientacion estrategica para su desar...
The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive poten... more The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive potentialities that require a strategic orientation for its sustainable development. The purpose of this research is to define the municipal vision and mission, as well as the potential development axis, that is considered a key input for the design and execution of local development proposals. Using the participative research method, based on workshops that use the Nominal Group Technique, we established the vision of the municipalities and the mission of the organizations involved in the local administration, necessary for the determination of the axis of potential development .
The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive poten... more The municipalities of Rafael Urdaneta and Junín in the state of Tachira, possess productive potentialities that require a strategic orientation for its sustainable development. The purpose of this research is to define the municipal vision and mission, as well as the potential development axis, that is considered a key input for the design and execution of local development proposals. Using the participative research method, based on workshops that use the Nominal Group Technique, we established the vision of the municipalities and the mission of the organizations involved in the local administration, necessary for the determination of the axis of potential development .