"Brooks's law" meaning in All languages combined

{
  "etymology_text": "Introduced by Fred Brooks in his 1975 book The Mythical Man-Month.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Brooks's law",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Software engineering",
          "orig": "en:Software engineering",
          "parents": [
            "Computer science",
            "Engineering",
            "Software",
            "Computing",
            "Sciences",
            "Applied sciences",
            "Technology",
            "Media",
            "All topics",
            "Communication",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The claim that adding manpower to a late software development project makes it even later."
      ],
      "id": "en-Brooks's_law-en-name-3qqJ2Q5J",
      "links": [
        [
          "manpower",
          "manpower"
        ],
        [
          "late",
          "late"
        ],
        [
          "software",
          "software"
        ],
        [
          "development",
          "development"
        ],
        [
          "project",
          "project"
        ]
      ]
    }
  ],
  "word": "Brooks's law"
}

{
  "etymology_text": "Introduced by Fred Brooks in his 1975 book The Mythical Man-Month.",
  "head_templates": [
    {
      "args": {},
      "expansion": "Brooks's law",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Software engineering"
      ],
      "glosses": [
        "The claim that adding manpower to a late software development project makes it even later."
      ],
      "links": [
        [
          "manpower",
          "manpower"
        ],
        [
          "late",
          "late"
        ],
        [
          "software",
          "software"
        ],
        [
          "development",
          "development"
        ],
        [
          "project",
          "project"
        ]
      ]
    }
  ],
  "word": "Brooks's law"
}