Evaluating efficiency in water and sewerage services: An integrated DEA approach with DOE and PCA
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Evaluating the performance of service organizations like Water and Sewerage companies is essential for optimal operations, high-quality service, and cost efficiency. This paper introduces a model using data envelopment analysis (DEA) to assess the efficiency of operational units within such companies. The selection of key performance indicators is complicated by the numerous inputs and outputs, each affecting systems and activities differently. To enhance DEA model performance due to the imbalance between the number of inputs/outputs and the number of units under evaluation, this research integrates design of experiments (DOE) and principal component analysis (PCA) for variable screening and data reduction, creating new linear combinations with minimal information loss. These methods represent a new direction in handling numerous variables in DEA models. Addressing unit heterogeneity by removing environmental factors from inputs reduces research errors. A case study showed that some units can achieve high efficiency with fewer inputs and more valuable outputs. The findings offered managerial insights for informed decision-making and strategic planning, optimizing resources in line with the company's mission and vision. This methodology ultimately improves service reliability, customer satisfaction, and environmental sustainability. The graphical abstract has been simplified to enhance readability and focus on the primary methodological advances. It emphasizes the integration of PCA for dimensionality reduction, DOE for variable scereening, and DEA for efficiency evaluation.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.010 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it