"man-month" meaning in English

{
  "forms": [
    {
      "form": "man-months",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "man-month (plural man-months)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Japanese translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Units of measure",
          "orig": "en:Units of measure",
          "parents": [
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Wikipedia with redundant first parameter",
          "orig": "wikipedia with redundant first parameter",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Holonyms: man-year, person-year"
        },
        {
          "text": "Meronyms: man-hour, person-hour < man day, person-day"
        },
        {
          "text": "In project management, there is always another dimbulb who will ask whether the relationship of man-months to calendar months is such that the schedule can be cut in half by doubling the headcount. The standard joke for disabusing this nonsense involves an expedited pregnancy lasting four and a half months instead of nine.",
          "type": "example"
        },
        {
          "ref": "1980, Richard S. Palais, “Message from the Chairman”, in TUGboat, volume 1, number 1, page 5:",
          "text": "Experience seems to indicate that developing such a TeX interface for a new output device takes on the order of one man-month.",
          "type": "quote"
        }
      ],
      "glosses": [
        "One person's working time for a month, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task."
      ],
      "id": "en-man-month-en-noun-LN~NvQiV",
      "links": [
        [
          "work",
          "work"
        ],
        [
          "labor",
          "labor"
        ],
        [
          "task",
          "task"
        ]
      ],
      "synonyms": [
        {
          "word": "person-month"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "amount of work",
          "word": "henkilötyökuukausi"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "amount of work",
          "tags": [
            "masculine"
          ],
          "word": "mois-homme"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "ningetsu",
          "sense": "amount of work",
          "word": "人月"
        }
      ]
    }
  ],
  "word": "man-month"
}

{
  "forms": [
    {
      "form": "man-months",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "man-month (plural man-months)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English terms with usage examples",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Japanese translations",
        "en:Units of measure",
        "wikipedia with redundant first parameter"
      ],
      "examples": [
        {
          "text": "Holonyms: man-year, person-year"
        },
        {
          "text": "Meronyms: man-hour, person-hour < man day, person-day"
        },
        {
          "text": "In project management, there is always another dimbulb who will ask whether the relationship of man-months to calendar months is such that the schedule can be cut in half by doubling the headcount. The standard joke for disabusing this nonsense involves an expedited pregnancy lasting four and a half months instead of nine.",
          "type": "example"
        },
        {
          "ref": "1980, Richard S. Palais, “Message from the Chairman”, in TUGboat, volume 1, number 1, page 5:",
          "text": "Experience seems to indicate that developing such a TeX interface for a new output device takes on the order of one man-month.",
          "type": "quote"
        }
      ],
      "glosses": [
        "One person's working time for a month, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task."
      ],
      "links": [
        [
          "work",
          "work"
        ],
        [
          "labor",
          "labor"
        ],
        [
          "task",
          "task"
        ]
      ],
      "synonyms": [
        {
          "word": "person-month"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "amount of work",
      "word": "henkilötyökuukausi"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "amount of work",
      "tags": [
        "masculine"
      ],
      "word": "mois-homme"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "ningetsu",
      "sense": "amount of work",
      "word": "人月"
    }
  ],
  "word": "man-month"
}