[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["難以理解","hardToUnderstand","thumb-down"],["資訊或程式碼範例有誤","incorrectInformationOrSampleCode","thumb-down"],["缺少我需要的資訊/範例","missingTheInformationSamplesINeed","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-09-04 (世界標準時間)。"],[],[],null,["# Set up migration timeline an apply discounts\n\nOn the **Migration timeline, pricing, and discounts** page, you can set up the\nmigration timeline.\n\nMigration waves take time to plan, schedule, and execute. Also, the advanced\nmigration waves tend to take longer to execute than the initial wave. Gauging\nthe cost over multiple years provides a long-term projection and a\nmore transparent cost.\n\nBefore you begin\n----------------\n\n- Complete the steps to specify [infrastructure](/migration-center/docs/estimate/infrastructure-details) and [workload](/migration-center/docs/estimate/enterprise-workloads) details.\n\nSet up the migration timeline and apply discounts\n-------------------------------------------------\n\n1. Optional: To change the pricing track used to calculate the estimate, in\n the **Pricing track** section, click **Change** , and then select a pricing\n track. By default, Google Cloud Migration Center cost estimation uses the\n **3-year committed use discount** pricing track.\n\n2. If you're eligible for discounts, then click **Apply the Enterprise Agreement\n (EA), Cloud Commitment Agreement (CCA), or service (family or SKU)\n discounts**. In the additional fields that appear, enter the applicable\n discounts for the Google Cloud services.\n\n3. To specify the total time you need to prepare your migration,\n in the **Time required to do migration** section, select the time\n required to set up a landing zone.\n\n | **Note:** You're not charged for the Google Cloud services until you start using them.\n4. By default, Google Cloud Migration Center uses a 5-year migration timeline and the\n following values for expected cumulative completion of the migration each\n year:\n\n - 15% in year 1\n - 30% in year 2\n - 50% in year 3\n - 75% in year 4\n - 100% in year 5\n\n If you want to update the migration timeline, then in the **Timelines**\n section, follow these steps:\n - Update the expectations for cumulative percentage completion of\n the migration for each year.\n\n - Add or remove a year from the migration timeline, and update the\n expectations for cumulative percentage completion of the migration for\n each year accordingly.\n\n5. To review and export your estimate results, click **Submit**.\n\nWhat's next\n-----------\n\n- Learn how to [review and update default assumptions](/migration-center/docs/estimate/review-defaults) used to generate the estimate for migrating your on-premises infrastructure to Google Cloud.\n- Learn how to [review and export the estimate results](/migration-center/docs/estimate/review-and-export-results)."]]