Requirements volatility: Changing requirements that impact delivery schedules and increase software rework and cost.

需求变化：变更需求将会影响交付的时间表并增加软件返工和成本。

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Through active promotion of the standard, production and construction requirements on power material procurement are met in quality, quantity and delivery schedule and the procurement cost is lowered.

通过积极推行标准，达到保证电力物资采购在质量、数量、供贷时间上满足生产，建设的要求，并降低了采购成本。

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