績效評核 (Performance Appraisal) 中的「拉curve」制度，對於年輕的一代可能比較陌生，近日香港政府擬於公務員的績效評核機制中引入「拉curve」，究竟這個曾經風靡一時的「拉curve」制度是什麼？
🔍 什麼是「拉Curve」(Forced Distribution / Forced Ranking) ？
簡單來說，「拉Curve」就是「強制對稱分布機制」。
主管在評核員工表現時，不單看員工的分數，而是必須將全隊員工按照固定的比例，塞進一個預設的框架內，以現時香港政府的暫時草擬為例：
📏 第一級 (優異) 不多於10%，不設下限
📏 第二級 (良好) 不多於20%，不設下限
📏 第三級 (常) 不少於50%，不設上限
📏 第四、五、六級 (尚可、欠佳、差劣) 合計不少於10%，不設上限
假若經評核後，第一級 (優異) 的員工有18%，但框架只容許不多於10%，則8%的員工要被拉去第二級 (良好) 。機構通常會增加一些彈性措施去平衡這個硬性框架。例如香港政府就提議每一級可容許+或-5%作緩衝，而且若參與職系為 50 人或以下，有彈性不強制分配第四級或以下的級別。
⚖️ 「拉Curve」的利與弊
「拉Curve」於管理上帶來明確優勢，曾經被通用電氣 (GE) 及微軟 (Microsoft) 等企業大力追捧，但近這10年，商業世界開始大幅減少使用。
🟢 好處（管理層視角）
- 避免「好人文化」： 逼使主管無法再做「懶好人」，無法給所有人好評。
- 精準汰弱留強： 機制能強制識別出需要提升或汰換的低效能員工。
- 控制人力成本： 透過固定比例，精準鎖定增薪與發放花紅的預算。
🔴 壞處（員工視角與團隊文化）
- 抹殺個人努力： 即使全隊都拼命工作，最後也必須有人被強行推去墊底。
- 滋生惡性內鬥： 員工之間為了不想成為「豬隊友」，傾向互相隱瞞、拒絕合作。
- 打擊士氣與誠信： 當實力不相上下時，分數高低往往流於主管的主觀偏好與辦公室政治。
每一個制度都有利弊，適用與否必須依當前局勢衡量，關鍵在於新制度能否消除舊制度的問題或帶來更多益處。當套用新制度時，後台系統能否無縫配合，會左右執行的成敗。
🛠️ 績效評核系統 (Appraisal System) 應有什麼功能配合「拉Curve」？
績效評核系統如具備以下基本功能將有效協助機構進行「拉Curve」：
📌 可視化圖表：將評核結果、預設框架、可容許的彈性緩衝百分比區域重疊，以查看每一級的人數是否超越上限，需要調整，抑或處於可容許的彈性緩衝百分比區域中，要盡早額外申請獲得批准。
📌 雙重評分儲存：評核結果與被「拉Curve」後的結果需要分開儲存，以作備考。
📌 評分修改紀錄：每個修改需要有紀錄，避免「山頭文化」黑箱作業。
📌 多年度紀錄：協助「拉Curve」時參考過往數據，讓有能力但沒有運氣的同事被看見。如有AI配合快速總結每位同事的過往紀錄將事半功倍。
📌 申訴機制：讓同事可以透過系統內的申訴機制，將聲音直接傳達至高層。
你的公司也有「拉Curve」制度嗎？在你公司而言，你認為這是一套公平的制度，還是已經過時的產物？
🌤️HR Observatory | Looking Back at “Curve-Grading”—The Once Ultra-Popular Appraisal System
The concept of “curve-grading” (or grading on a curve) in Performance Appraisals might sound unfamiliar to the younger generation. However, with the Hong Kong government recently proposing to introduce “curve-grading” into the civil service performance evaluation mechanism, it is worth looking back at what this once globally popular system is all about.
🔍 What is “Curve-Grading” (Forced Distribution / Forced Ranking)?
Simply put, “curve-grading” is a forced distribution mechanism. When evaluating staff performance, managers cannot look at an employee’s absolute score alone. Instead, they must fit the entire team into a preset framework based on fixed percentages. Take the Hong Kong government’s current draft proposal as an example:
📏 Tier 1 (Outstanding): Max 10%, no lower limit
📏 Tier 2 (Very Effective): Max 20%, no lower limit
📏 Tier 3 (Effective): Min 50%, no upper limit
📏 Tiers 4, 5, & 6 (Moderate, Unsatisfactory, Poor): Combined min 10%, no upper limit
For example, if 18% of the staff are rated as Tier 1 (Outstanding) after the initial evaluation, but the framework only allows a maximum of 10%, then 8% of those employees must be pushed down to Tier 2 (Very Effective).
To balance this rigid framework, organizations usually introduce some flexible measures. For instance, the Hong Kong government proposes allowing a +/- 5% buffer zone for each tier. Furthermore, if a participating grade consists of 50 staff members or fewer, managers have the flexibility to waive the mandatory allocation for Tier 4 or below.
⚖️ The Pros and Cons of “Curve-Grading”
“Curve-Grading” brings clear advantages in management and was once heavily favored by corporate giants like General Electric (GE) and Microsoft. Over the past decade, however, the business world has significantly reduced its usage.
🟢 The Pros (Management Perspective)
- Curing the “Nice Guy” Culture: It forces managers to make tough decisions, preventing them from playing the “nice guy” who gives everyone a glowing review.
- Precise Identification of Low Performers: The mechanism systematically identifies low-efficiency employees who need improvement or replacement.
- Controlling Labor Costs: Through fixed proportions, it precisely locks in the budget for salary increments and bonuses.
🔴 The Cons (Employee Perspective & Team Culture)
- Wiping Out Individual Effort: Even if the entire team works tirelessly, someone must be forced to the bottom just to fill the quota.
- Breeding Toxic Internal Competition: To avoid becoming the “weakest link,” employees tend to hide information and refuse to cooperate with one another.
- Damaging Morale and Integrity: When team members have similar capabilities, the actual ratings often boil down to managerial favoritism and office politics.
Every system has its pros and cons, and its suitability depends on the current organizational context. Ultimately, the success of a new system relies on whether it can eliminate old flaws or bring greater benefits. When adopting a new system, whether the backend platform can seamlessly support it will determine its success or failure.
🛠️ What Features Should an Appraisal System Have to Support “Curve-Grading”?
A performance appraisal system equipped with the following basic features will effectively assist organizations in implementing “curve-grading”:
📌 Visualized Charts: Overlay actual evaluation results, preset frameworks, and allowed buffer zones. This lets managers see at a glance if any tier exceeds the limit and needs adjustment, or if it falls within the buffer zone requiring early approval.
📌 Dual Scoring: The actual performance score and the post-curve final grade must be stored separately for future reference.
📌 Rating Modification History (Audit Trail): Every single change must be logged to prevent “silo cultures” and black-box operations.
📌 Multi-Year Records: This helps managers reference past data during curve adjustments, ensuring that capable employees who lacked a bit of luck this year remain visible. This works best when paired with AI to quickly summarize each employee’s history.
📌 Appeals Mechanism: This allows employees to voice their concerns directly to senior management through a standardized appeals process within the system. Does your company use a “curve-grading” system? From your company’s perspective, do you think it is a fair system, or is it an outdated relic? Feel free to share your thoughts in the comments!
參考資料 Reference:
Civil Service Bureau https://www.csb.gov.hk/tc_chi/info/files/PanelPaper_PerformanceAppraiasl_C_June2026.pdf