{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FDFYSRXQ2UWXEPMP62HZK3RZP4","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"447e40d3c10a2ea4fd82b1fb3248a974b4f8455f146db16f4f255c9da7ad678b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2018-04-02T17:14:50Z","title_canon_sha256":"ddd6fe41561e971c4a12f3eea32114281b5390cbdf53f467b782630f99be1789"},"schema_version":"1.0","source":{"id":"1804.00626","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.00626","created_at":"2026-05-18T00:19:36Z"},{"alias_kind":"arxiv_version","alias_value":"1804.00626v1","created_at":"2026-05-18T00:19:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.00626","created_at":"2026-05-18T00:19:36Z"},{"alias_kind":"pith_short_12","alias_value":"FDFYSRXQ2UWX","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FDFYSRXQ2UWXEPMP","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FDFYSRXQ","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:51658cf0ef4bc2c9f0f3a5f6fbc7716af8185619daf55757f0e6c804a5408a2e","target":"graph","created_at":"2026-05-18T00:19:36Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Industrial practitioners now face a bewildering array of possible configurations for effort estimation. How to select the best one for a particular dataset?\n  This paper introduces OIL (short for optimized learning), a novel configuration tool for effort estimation based on differential evolution. When tested on 945 software projects, OIL significantly improved effort estimations, after exploring just a few configurations (just a few dozen). Further OIL's results are far better than two methods in widespread use: estimation-via-analogy and a recent state-of-the-art baseline published at TOSEM'","authors_text":"George Mathew, Jianfeng Chen, Tianpei Xia, Tim Menzies, Xipeng Shen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2018-04-02T17:14:50Z","title":"Why Software Effort Estimation Needs SBSE"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.00626","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:29db780e075ddfc78ebf98ba548047766bffaf5868534216f66bbb1eade12514","target":"record","created_at":"2026-05-18T00:19:36Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"447e40d3c10a2ea4fd82b1fb3248a974b4f8455f146db16f4f255c9da7ad678b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2018-04-02T17:14:50Z","title_canon_sha256":"ddd6fe41561e971c4a12f3eea32114281b5390cbdf53f467b782630f99be1789"},"schema_version":"1.0","source":{"id":"1804.00626","kind":"arxiv","version":1}},"canonical_sha256":"28cb8946f0d52d723d8ff68f956e397f2b45d8234dbbdec18d3543e9a36eeaca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"28cb8946f0d52d723d8ff68f956e397f2b45d8234dbbdec18d3543e9a36eeaca","first_computed_at":"2026-05-18T00:19:36.435993Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:36.435993Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iOLfWxBiGOnlZ7SUSrK4YowZylf+IabxOzfmQBDnAjvycp3t0bA5efAyXz6p9tzWLckasKAzE/6graWnB20qBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:36.436643Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.00626","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29db780e075ddfc78ebf98ba548047766bffaf5868534216f66bbb1eade12514","sha256:51658cf0ef4bc2c9f0f3a5f6fbc7716af8185619daf55757f0e6c804a5408a2e"],"state_sha256":"c02a064119189a784a77a41525738b7f7ec87866619d54cde9d64fbfdef01a43"}