While I would generally agree with the statement, at least to an extent, the Mythical Man Month actually only proposes that adding more developers to a/late/ project, will only aggravate the situation. If you read the paragraph you quoted, its stated there as well ("...when schedule slippage is recognized...").
While I would generally agree with the statement, at least to an extent, the Mythical Man Month actually only proposes that adding more developers to a /late/ project, will only aggravate the situation. If you read the paragraph you quoted, its stated there as well ("...when schedule slippage is recognized...").