近年來，資訊科技的蓬勃發展，對會計師事務所產生極大的衝擊。國內多家大型事務所已體認列資訊科技對其產生的影響，紛紛開始電腦化，利用電腦來幫助查核人員進行查核工作。專家系統是資訊科技的一項應用，該系統可將專家的知識和經驗建構於電腦上，並以類似專家解決問題的方式，對某一特定問題領域提供建議或答案，並能解釋推論的結果。

本研究嘗試將專家系統與審計工作的專業技術相結合，以查核風險之評估為對象，運用專家系統建構外殼1st-Class，發展應收帳款抽樣樣本量評定雛型系統，俾瞭解審計專家從事此項評估工作所涉及的知識與經驗及其決策過程，並評估專家系統應用於查核風險評估之可行性。經由研究探討，本論文所得的結論如下：

1.運用專家系統之觀念與技術於查核風險的評估是可行的，

2.領域專家的選擇，除考慮其是否有豐富的知識經驗外，亦應重視其是否有協助系統開發的熱忱，

3.使用專家系統建構外殼來開發專家系統僅需建構知識庫，不但易學易用，且開發速度十分快，適合作為開發雛型系統的工具，及

4.運用人際溝通方式來進行知識擷取十分耗費時間，是否可運用其他方法來加速知識擷取，值得進一步研究。

In recent years, the rapid development in information technology has a significant impact on CPA firms. Many of the large CPA firms in Taiwan have recognized such an impact, and begun computerizing their audit works. An expert system is one of the applications of information technology. It is a computer-based system that uses knowledge, facts and reasoning techniques to solve problems that normally require the abilities of human experts.

In this research, we attempt to combine expert systems with audit proficiency, especially in the area of audit risk assessment. An expert system shell, Ist-Class, is used to construct aprototype expert system which can help auditors in deciding the sample size of accounts receivable to be examined. The prototype system manifests how an audit expert uses his knowledge, experience, and decision process in the above evaluation process. We also evaluate the feasibility of using expert system in audit risk assessment. Based on our research results, we conclude that:

1. The application of expert systems concepts and techniques in audit risk assessment is feasible,

2. When choosing a domain expert, the emphasis is not only on the expert's knowledge and experience, but also on his willingness to provide assistance throughout the project,

3. An expert system shell is easy to learn and use, therefore, aconvenient research tool for similar projects, and

4. It is time-consuming to acquire an expert's knowledge through interviews. Future research may consider other methods of knowledge acquisition,