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REVIEW 4 major objections 4 minor 69 references

Reducing the Effort for Systematic Reviews in Software Engineering

T0 review · 4 major / 4 minor · reviewed 2026-08-14 · deepseek-v4-flash

Pith's one-line read This paper claims that an automated ontology-driven pipeline, EDAM, classifies primary studies for software-engineering systematic reviews as accurately as senior human researchers, reporting statistical evidence of equivalence (p=0.77).

desk verdict A plausible feasibility study whose headline claim overreaches: the evaluation only samples EDAM's unambiguous single-topic cases, so 'statistically indistinguishable from senior researchers' is not established, but the methodology and public data are worth engaging. read the letter →

arxiv 1908.06676 v1 pith:EIOEZKWP submitted 2019-08-19 cs.SE cs.DL

classification cs.SEcs.DL
keywords systematicreviewssoftwareengineeringontologylearningsemanticwebarchitectureprimarystudyclassificationexpert-drivenmethodologydigitallibraries
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

The paper aims to establish that the least creative steps of a systematic review, keywording primary studies and assigning them to a classification schema, can be handed to an automated pipeline, EDAM, without losing accuracy. EDAM first learns a domain ontology (a hierarchy of research topics) from scholarly metadata, has experts refine that ontology, and then automatically classifies each paper under every ontology topic whose label or a subcategory label appears in its title, abstract, or keywords. On a 25-paper evaluation in the Software Architecture area, the authors report that EDAM's annotations agreed with the majority of six human annotators and were not statistically distinguishable from the annotations of the senior researchers (p=0.77). If that result holds, systematic reviews could scale to datasets of hundreds of thousands of papers while freeing researchers for analysis and synthesis.

What carries the argument

The load-bearing mechanism is the EDAM three-stage pipeline. First, the Klink-2 algorithm, an ontology-learning method that infers hierarchical topic relationships from co-occurrence statistics, temporal signals, string similarity, and external sources, builds a multi-level ontology of the field from a large scholarly dataset (the Software Engineering ontology produced here has 956 topics and 5,461 relationships). Second, domain experts refine the ontology by adding or deleting categories and relationships, a step reported to take about 20 minutes for 46 topics. Third, a direct-mapping function assigns each paper to every topic whose label, equivalent label, or subcategory label appears in the paper's title, abstract, or keywords; this mapping is what lets the classification run at scale and be reproduced exactly.

What would settle it

Sample papers from the same domain at random, without pre-selecting only those EDAM classifies unambiguously, then compare EDAM's labels against the majority of several senior researchers; if EDAM's agreement with the majority falls below the average human-human agreement, the claimed equivalence does not generalise to the real classification task.

Watch

Extended reading notes

Core claim

On the paper's own terms, the discovery is that an ontology-driven automatic classifier can stand in for a human expert during primary-study classification. EDAM classifies a paper by checking its title, abstract, and keywords against a hierarchy of research topics: the paper is assigned to every category whose label, an equivalent label, or a label of a subcategory appears in the metadata. Comparing EDAM with six human annotators on 25 papers drawn from five unambiguous Software Architecture topics, the authors find that EDAM has the highest average pairwise agreement, agrees with the relative majority of annotators in 84% of the cases, and its behaviour is not statistically different from the senior group (p=0.77). The authors conclude that EDAM can replace manual keywording and classification in a systematic review.

Load-bearing premise

That the 25 evaluation papers, all chosen because EDAM assigned them to one of five categories without ambiguity, fairly represent the full mix of papers a systematic review must classify.

Editorial extensions

If this is right

  • Researchers can drop the manual keywording and classification phases of a systematic review and instead refine an ontology, select inclusion criteria, and run a scripted classification.
  • Mapping studies can cover complete corpora rather than samples, because the automatic pipeline has no human time bottleneck.
  • A validated domain ontology can be reused for later updates and replications, so the same review can be refreshed with new publications without repeating the classification work.
  • The machine-readable ontology plus mapping function makes the classification process reproducible and auditable, since the rules are explicit rather than hidden in an annotator's judgment.
  • The paper's comparison of classifiers shows that when recall matters more than precision, the same EDAM pipeline can swap in a different unsupervised classifier that yields a higher F-measure at lower precision.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • The paper only evaluates 25 papers that EDAM itself assigned unambiguously to one of five topics, so the headline equivalence is not directly established for multi-topic, ambiguous, or previously misclassified papers; a deployment would likely need a confidence threshold or expert adjudication for such cases, which the paper does not test.
  • Because the ontology-learning step detects mature topics more readily than emerging ones, an EDAM review aimed at detecting brand-new research fronts would probably miss them unless experts add the new topics manually; the paper acknowledges this but does not quantify the effect.
  • The reuse scenarios imply a future shared ecosystem of validated domain ontologies; a natural test would be to have two independent expert panels refine the same automatically learned ontology and measure how much their refinements diverge.
  • The same classification machinery could be pointed at non-English metadata or other scholarly corpora, but the current evidence is limited to Computer Science metadata from 2005-2013, so transfer should be verified per domain.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 4 minor

Summary. The paper proposes EDAM, an Expert-Driven Automatic Methodology for assisting systematic reviews in software engineering. EDAM replaces the manual keywording and data-extraction steps of a mapping study with (i) automatic ontology learning from a scholarly dataset, (ii) human refinement of that ontology, and (iii) automatic classification of primary studies against the refined ontology. The methodology is instantiated for the Software Architecture area using the Klink-2 algorithm on a Scopus dump, producing a 46-topic Software Architecture sub-ontology. The authors evaluate the classification step by comparing EDAM's annotations on 25 papers with those of six human experts, report that EDAM is not statistically different from the senior expert group (p=0.77), compare several unsupervised classifiers on a separate 70-paper gold standard, and discuss limitations, reuse scenarios, and implications for systematic mappings. The paper concludes that EDAM allows researchers to skip tedious keywording and classification tasks, freeing effort for analysis and discussion.

Significance. If the central equivalence claim were fully supported, the paper would make a useful contribution: it provides a concrete, reproducible pipeline for ontology-driven systematic mapping studies, releases its data and ontology, and includes a human-annotation comparison that is rare in this literature. The classifier comparison in Section 5.2 is also a valuable empirical baseline, and the authors are explicit about several limitations. However, the evaluation as reported does not establish the advertised equivalence for the realistic multi-label classification workload, and the effort-reduction motivation is not measured. The contribution is therefore promising but currently preliminary: the methodology is plausible and well described, but the load-bearing evaluation needs to be strengthened before the abstract-level claims can be accepted.

major comments (4)
  1. [Section 5.1, evaluation sample] The 25-paper evaluation sample is not representative of the actual classification task. The authors write that for each of five hand-picked categories they "randomly selected from the DSA dataset five primary studies that were classified by EDAM exclusively under that topic." This conditions the sample on exactly the cases where EDAM's exact-term mapping is strongest, and it excludes the ambiguous and multi-topic papers that arise in real systematic reviews. This is especially problematic because Section 4.2 (step 6) explicitly states that the mapping "allows us to associate multiple categories to the same paper" over a 46-topic ontology. The reported p=0.77 and the 84% majority-agreement figure therefore support equivalence only for single-topic, unambiguous cases, not for the multi-label classification workload that EDAM is designed to automate. The authors should re-run the evaluation on a random sample of DSA or DSA-MV without filtering on EDAM's exclusivity, and should report multi-label agreement measures (e.g., per-label precision/recall or multi-label kappa) rather than only forced single-label agreement.
  2. [Section 5.1, statistical inference] The claim that EDAM is "not statistically different" from the senior group rests on a p-value of 0.77, but the paper does not provide the details of the chi-square test (the contingency table, the categories included, or the expected cell counts). More importantly, with n=25, failing to reject the null hypothesis is not evidence of equivalence. The appropriate analysis would be an equivalence test (e.g., a two one-sided test with a pre-specified agreement margin) or a confidence interval for the difference in agreement rates. As it stands, the statement "not statistically different" overstates what the experiment can show, and the abstract's unqualified conclusion is not justified by the statistical evidence.
  3. [Sections 4.2 and 5.1, circularity] There is a circular structure in the evaluation. The ontology is learned from the same Scopus dump that is later used to construct DSA and DSA-MV (steps 2-5 of Section 4.2), and the evaluation sample is drawn from papers that EDAM itself classified unambiguously using the same term-matching mapping function (step 6). This means the evaluation is effectively testing EDAM on cases generated by EDAM's own decision rule. An independent evaluation, using papers that were not part of the ontology-learning corpus or at least not filtered by EDAM's exclusivity, is needed to support the claim that the classification generalizes to the broader population of primary studies.
  4. [Abstract, Section 1, and Section 5.3] The paper's stated goal is to reduce the effort of systematic reviews, and the abstract and conclusions claim that EDAM lets researchers "skip the tedious tasks" of keywording and manual classification. However, no effort measurement is reported. The only quantitative time-related datum is the approximately 20 minutes experts spent reviewing a 46-topic ontology in Section 4.1; there is no comparison of total time or workload between a manual mapping study and an EDAM-assisted one. The effort-reduction claim is load-bearing for the paper's motivation, so either an effort evaluation (even a rough time-and-motion comparison) should be added, or the claims should be softened to say that EDAM automates classification rather than demonstrating a reduction in effort.
minor comments (4)
  1. [Section 5.2, LDA description] In the description of the LDA baselines, the third model is listed as "LDA100" but appears to be the 1,000-topic model; it should be labeled LDA1000 for consistency with the preceding two sentences.
  2. [Section 5.2, typos] The paragraph contains spelling errors such as "automaticaly", "affectiveness", and "avaliable"; these should be corrected before publication.
  3. [Section 5.2, classifier comparison] The classifier comparison in Section 5.2 uses a different gold standard (70 papers from Semantic Web, NLP, and Data Mining) than the human-annotator evaluation in Section 5.1; this should be stated explicitly in the text so that readers do not conflate the two evaluations when interpreting the reported F-measures.
  4. [Figures 6 and 8] The text in Section 4.2 says Figure 6 shows the "percentage of papers published over time," while the figure caption says "Number of publications of the top ten main topics in DSA over time." The y-axis metric should be defined consistently in the text and captions.

Circularity Check

2 steps flagged · score 4.0 of 10

Evaluation samples EDAM's own unambiguous single-topic assignments, so the expert-equivalence claim is only demonstrated on an easy, self-selected subset; the trend analysis also re-describes the ontology-learning corpus.

  1. self definitional [Section 5.1, 'Evaluation of the primary study classification']
    "For simplifying the task and allowing to compare the annotation algorithmically, we first selected five unambiguous categories from the main topics of SA: Design Decisions, Service-oriented Architectures, Model-driven Architectures, Architecture Description Languages, and Views. For each category, we randomly selected from the DSA dataset five primary studies that were classified by EDAM exclusively under that topic, for a total of 25 papers."

    EDAM's mapping function (Section 4.2, step 6) assigns a paper to a category exactly when the title, abstract, or keywords contain the category label, a relatedEquivalent, a broader category, or an equivalent of a broader category. The evaluation sample is therefore selected on EDAM's own outcome: 'classified by EDAM exclusively under that topic' guarantees, by definition of the mapping function, that each sampled paper contains the term EDAM matches. EDAM's labels in the test set are fixed by the inclusion criterion, so the test cannot observe misclassification on ambiguous or multi-topic papers, and the reported p=0.77 compares EDAM with senior experts only on this easy subset. The paper itself concedes the point: 'It thus seems to perform well in handling simple not-ambiguous papers.'

  2. renaming known result [Section 4.2, steps 2-3 and 7]
    "We selected all papers in a dump of the Scopus dataset about Computer Science in the period 2005-2013. ... We applied the Klink-2 algorithm [37] on the Scopus dump for learning an ontology representing the main 'Software Architecture' research area in SE. ... We identified the main trends by running a script to count the number of studies about each sub-topic in each year."

    Klink-2 learns the ontology from term co-occurrence statistics over the same Scopus dump that is later classified and counted. The trend analysis (e.g., the reported rise of Model-driven Architectures) counts papers by the very labels and equivalent terms that the ontology-learning step had already extracted as frequent in that corpus. The 'findings' are thus a re-description of the corpus statistics that generated the ontology, not an independent confirmation. This is descriptive data synthesis rather than a falsifiable prediction, so it is less damaging than the evaluation sampling issue, but it is still a partial circularity in the presentation of the illustrative trend results.

full rationale

The central equivalence claim is not fully circular: EDAM's classifications are compared with six independent human annotators, and the agreement statistics (p=0.77 with the senior group; Cohen's kappa 0.58 on average) are genuine observations about those annotators. However, the evaluation set is constructed from papers that EDAM had already classified exclusively into one of five categories under an exact-term matching function, which fixes EDAM's labels on the test set by construction and excludes the multi-label, ambiguous cases that the paper itself says EDAM's step 6 handles ('it allows us to associate multiple categories to the same paper'). The ontology is also learned from the same Scopus dump that is later classified and counted, so the illustrative trend analysis re-describes the corpus rather than testing a hypothesis. The citations to Klink-2 [37] and CSO [52] are self-citations by the same group, but the paper specifies Algorithm 1 and the mapping function, and the human evaluation is external to those prior papers, so those self-citations are not the main load-bearing element. The chi-square 'not significant' result is not an equivalence test either, though that is a statistical-validity concern rather than a circularity. Overall the core claim has independent human-judgment content, but its scope is overstated because the sample design selects exactly the cases where EDAM's term matching succeeds.

Assumptions & free parameters 4 free parameters · 4 assumptions · 0 invented entities

EDAM does not introduce new physical entities or forces. The pipeline depends on inherited numeric parameters from Klink-2, on the assumption that term matching is a faithful proxy for topic content, and on the assumption that the Scopus dataset and small expert refinement are unbiased enough for ontology construction. No independent falsifiable handle is provided for the correctness of the generated ontology beyond the downstream evaluation.

free parameters (4)
  • Klink-2 subsumption threshold = 0.25
    Hierarchical relationships between topics are inferred whenever HR(x,y) or TR(x,y) exceeds 0.25, which shapes the ontology's granularity and therefore the classification of papers into topics.
  • Klink-2 temporal weight gamma = 2
    The temporal relationship metric TR weighs yearly co-occurrences by (year - debut + 1)^gamma with gamma=2, affecting which topic relationships are inferred and thus the ontology structure.
  • LDA grid-search thresholds (j, k) = Best values found on the gold standard; individual values not reported
    The LDA baseline classifiers were tuned by grid search on the same 70-paper gold standard used for evaluation, so their reported F-measures are optimistic.
  • Levenshtein similarity thresholds for term mapping = 0.8 for TF-IDF and LDA mapping; 0.94 for CSO-C1
    These thresholds control which terms are mapped to CSO topics in the classifier comparison, directly affecting precision and recall.
assumptions (4)
  • domain assumption Exact matching of ontology labels, equivalents, and broader terms in title, abstract, or keywords is a sufficient proxy for the topical content of a paper.
    This is the mapping function defined in Section 4.2 step 6. If term presence does not reflect topic content, the entire classification step fails.
  • domain assumption The Scopus Computer Science dump for 2005-2013 is an unbiased representation of the Software Architecture literature.
    Section 4.2 step 2 selects this dataset for ontology learning and asserts it is unbiased with respect to the study focus. Any bias propagates into the ontology and the selection of primary studies.
  • domain assumption Three senior researchers refining the ontology through a spreadsheet, with majority vote for disagreements, yields a taxonomy consistent with the research community.
    Section 4.1 step 4 relies on this expert refinement as the bridge between the data-driven ontology and the community's mental model. The classification evaluation then compares against other senior researchers, assuming this refined ontology is a fair basis.
  • domain assumption The Klink-2 algorithm performs correctly, and its published evaluation on Semantic Web topics transfers to the Software Architecture subtopic.
    The paper uses Klink-2 from prior work [37] without re-evaluating it on the Software Architecture ontology. The quality of the generated ontology is load-bearing for EDAM.

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Cite this review

Pith. "Pith review of Reducing the Effort for Systematic Reviews in Software Engineering." pith.science (2026). https://pith.science/paper/EIOEZKWP

@misc{pith2026190806676,
  author       = {Pith},
  title        = {Pith review of: Reducing the Effort for Systematic Reviews in Software Engineering},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/EIOEZKWP}},
  note         = {Machine review of arXiv:1908.06676}
}
read the original abstract

Context. Systematic Reviews (SRs) are means for collecting and synthesizing evidence from the identification and analysis of relevant studies from multiple sources. To this aim, they use a well-defined methodology meant to mitigate the risks of biases and ensure repeatability for later updates. SRs, however, involve significant effort. Goal. The goal of this paper is to introduce a novel methodology that reduces the amount of manual tedious tasks involved in SRs while taking advantage of the value provided by human expertise. Method. Starting from current methodologies for SRs, we replaced the steps of keywording and data extraction with an automatic methodology for generating a domain ontology and classifying the primary studies. This methodology has been applied in the Software Engineering sub-area of Software Architecture and evaluated by human annotators. Results. The result is a novel Expert-Driven Automatic Methodology, EDAM, for assisting researchers in performing SRs. EDAM combines ontology-learning techniques and semantic technologies with the human-in-the-loop. The first (thanks to automation) fosters scalability, objectivity, reproducibility and granularity of the studies; the second allows tailoring to the specific focus of the study at hand and knowledge reuse from domain experts. We evaluated EDAM on the field of Software Architecture against six senior researchers. As a result, we found that the performance of the senior researchers in classifying papers was not statistically significantly different from EDAM. Conclusions. Thanks to automation of the less-creative steps in SRs, our methodology allows researchers to skip the tedious tasks of keywording and manually classifying primary studies, thus freeing effort for the analysis and the discussion.

Figures

Figures reproduced from arXiv: 1908.06676 by the authors.

Figure 1
Figure 1. Some evidence on the Benefits of Automated SRs [PITH_FULL_IMAGE:figures/full_fig_p005_1.png] view at source ↗
Figure 2
Figure 2. Steps of a systematic mappings adopting the EDAM methodology. The gray-shaded elements refer to the alternative [PITH_FULL_IMAGE:figures/full_fig_p006_2.png] view at source ↗
Figure 3
Figure 3. Classic steps of systematic mappings (inspired by [42]) [PITH_FULL_IMAGE:figures/full_fig_p006_3.png] view at source ↗
Figures from the paper (8 more)
Figure 4
Figure 4. Figure 4: Number of publications in DSA and DSA-MV over the years. [PITH_FULL_IMAGE:figures/full_fig_p014_4.png]
Figure 5
Figure 5. Figure 5: Number of publications and citations of the main topics in DSA and DSA-MV. [PITH_FULL_IMAGE:figures/full_fig_p015_5.png]
Figure 6
Figure 6. Figure 6: Number of publications of the top ten main topics in DSA over time. [PITH_FULL_IMAGE:figures/full_fig_p016_6.png]
Figure 7
Figure 7. Figure 7: Comparison DSA and DSA-MV in terms of topic distribution. The percentage value refers to the ratio between the [PITH_FULL_IMAGE:figures/full_fig_p017_7.png]
Figure 8
Figure 8. Figure 8: Number of publications of the top ten main topics in DSA-MV over time. [PITH_FULL_IMAGE:figures/full_fig_p018_8.png]
Figure 9
Figure 9. Figure 9: Percentage of annotations that agree with other [PITH_FULL_IMAGE:figures/full_fig_p019_9.png]
Figure 10
Figure 10. Figure 10: (S2a)). The list of (updated) primary studies can be automatically re-calculated (in step [PITH_FULL_IMAGE:figures/full_fig_p024_10.png]
Figure 10
Figure 10. Figure 10: Possible EDAM applications [PITH_FULL_IMAGE:figures/full_fig_p030_10.png]

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Pith tools

Reviewed August 14, 2026 · model on record in the stance chip above.