Enlisted by then Taipei mayor Chen Shui-bian to chair the Commission for Examining Petitions and Appeals, Chang accepted the position. But she discovered that the committee members were mostly City Hall deputies, which made it difficult for Taipei citizens to believe they could get a fair shake from government officials policing themselves. She requested that the entire committee be selected anew to include lawyers and other professionals from the private sector.
陳水扁在台北市長任內邀請她擔任訴願委員會主委，當她發現訴願委員都是市府各單位副首長兼任，球員兼裁判的情形很難讓訴願的市民服氣，她遂將訴願委員全數換血，由律師等民間人士擔任，避免落人官官相護的口實。