The decisions concerning portfolio selection for army engineering and manufacturing development projects determine the benefit of those projects to the country concerned.Projects are typically selected based on ex ant...The decisions concerning portfolio selection for army engineering and manufacturing development projects determine the benefit of those projects to the country concerned.Projects are typically selected based on ex ante estimates of future return values,which are usually difficult to specify or only generated after project launch.A scenario-based approach is presented here to address the problem of selecting a project portfolio under incomplete scenario information and interdependency constraints.In the first stage,the relevant dominance concepts of scenario analysis are studied to handle the incomplete information.Then,a scenario-based programming approach is proposed to handle the interdependencies to obtain the projects,whose return values are multi-criteria with interval data.Finally,an illustrative example of army engineering and manufacturing development shows the feasibility and advantages of the scenario-based multi-objective programming approach.展开更多
Background: Multiple Choice Questions (MCQs) are well known and widely used assessment tool. They can be used to measure the different levels of educational outcomes: knowledge, understanding, judgment and problem sol...Background: Multiple Choice Questions (MCQs) are well known and widely used assessment tool. They can be used to measure the different levels of educational outcomes: knowledge, understanding, judgment and problem solving. Traditional MCQs (stand-alone MCQs) often are used as a tool for facts recall. Advantages of using Scenario-based questions (SBQs) include more focus on learning objectives and ability to assess higher levels of learning. Shifting to scenario-based questions can increase the level of difficulty and measure higher levels of cognition. Purpose: This study explores the current knowledge and overall awareness of the undergraduate teaching staff about the use and difficulties of scenario-based single-best answer, multiple-choice questions (SB-SBA-MCQs) in assessments of the basic medical sciences. Method: We used an e-Likert scale questionnaire to explore this issue. The questionnaire covered the current knowledge, experience of staff in writing (SB-SBA-MCQs), courses or postgraduate degrees they attended and difficulties they face or anticipate in writing (SB-SBA-MCQs). Results: The majority (86%) are familiar with courses or workshops related to MCQs writing and assessment in general, a small minority have not attended any. The majority (86%) had some experience in writing MCQs. Only, a small percentage have not tried writing this type of MCQs. Nearly 60% think it takes time to construct, the majority (96%) of those researched are in support of shifting to scenario-based MCQs in basic medical sciences. Conclusion: The study has shown most of the teachers of basic medical sciences are aware of and with good knowledge in (SB-SBA-MCQs). It also highlighted the importance and need for regular training courses and workshops on the same.展开更多
基金supported by the National Natural Science Foundation of China(7157118571201168)
文摘The decisions concerning portfolio selection for army engineering and manufacturing development projects determine the benefit of those projects to the country concerned.Projects are typically selected based on ex ante estimates of future return values,which are usually difficult to specify or only generated after project launch.A scenario-based approach is presented here to address the problem of selecting a project portfolio under incomplete scenario information and interdependency constraints.In the first stage,the relevant dominance concepts of scenario analysis are studied to handle the incomplete information.Then,a scenario-based programming approach is proposed to handle the interdependencies to obtain the projects,whose return values are multi-criteria with interval data.Finally,an illustrative example of army engineering and manufacturing development shows the feasibility and advantages of the scenario-based multi-objective programming approach.
文摘Background: Multiple Choice Questions (MCQs) are well known and widely used assessment tool. They can be used to measure the different levels of educational outcomes: knowledge, understanding, judgment and problem solving. Traditional MCQs (stand-alone MCQs) often are used as a tool for facts recall. Advantages of using Scenario-based questions (SBQs) include more focus on learning objectives and ability to assess higher levels of learning. Shifting to scenario-based questions can increase the level of difficulty and measure higher levels of cognition. Purpose: This study explores the current knowledge and overall awareness of the undergraduate teaching staff about the use and difficulties of scenario-based single-best answer, multiple-choice questions (SB-SBA-MCQs) in assessments of the basic medical sciences. Method: We used an e-Likert scale questionnaire to explore this issue. The questionnaire covered the current knowledge, experience of staff in writing (SB-SBA-MCQs), courses or postgraduate degrees they attended and difficulties they face or anticipate in writing (SB-SBA-MCQs). Results: The majority (86%) are familiar with courses or workshops related to MCQs writing and assessment in general, a small minority have not attended any. The majority (86%) had some experience in writing MCQs. Only, a small percentage have not tried writing this type of MCQs. Nearly 60% think it takes time to construct, the majority (96%) of those researched are in support of shifting to scenario-based MCQs in basic medical sciences. Conclusion: The study has shown most of the teachers of basic medical sciences are aware of and with good knowledge in (SB-SBA-MCQs). It also highlighted the importance and need for regular training courses and workshops on the same.
