What Actually Drives Software Development Costs > 자유게시판

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The dominant factor is never the technology stack — it remains how much is still undecided. Each unanswered question in the requirements turns into padding inside the number you receive. A vendor that does not know the edge cases will assume the more expensive option. Spending a week on a discovery phase frequently cuts the total much more than negotiating the rate.

Connections to other systems remain another reliable source of cost. A feature that touches only your own data is easy to estimate; the same feature wired into an old accounting system is not. The effort sits in the counterparty: poor documentation, slow approval cycles, inconsistent data. Ask each bidder to price integrations separately, because this is the usual source of overruns.

Non-functional requirements quietly rewrite the number. An internal tool used by twenty people costs far less than the same idea handling public traffic. Compliance work, high availability, scalability, traceability and multi-language support all add weeks of work. Put them in the brief or expect them to arrive later as change requests.

The mix of people behind the number matters. An hourly rate says little on its own: dedicated team outsourcing an experienced engineer at a premium rate frequently turns out to be cheaper per delivered feature than a pair of junior hire remote angular developers who need heavy code review. Check too who else is billed: coordination, QA, release engineering and design are real work, but these should be visible in the estimate.

The quoted figure is not what you will actually spend. Expect cloud costs, subscriptions and licences, monitoring and a maintenance allowance each year. A reasonable rule of thumb is that any production system requires a recurring percentage of the initial investment every year for updates, security patches and small improvements. Ignoring this remains the classic mistake.