On March 13, 2012, the Board of Directors of PDF Solutions Inc. appointed Mr. Shahbazian as principal financial and accounting officer on a temporary basis. This temporary arrangement is the result of an unexpected leave by the company's Vice President, Finance and Chief Financial Officer, Mr. Walker, during which time Mr. Walker will remain an employee of the Company but is not expected to perform his responsibilities as principal financial officer. Mr. Walker has informed the Company that he plans to resume his responsibilities within six to twelve weeks. Under the temporary employment offer with Mr. Shahbazian, his title will be Vice President, and he will act as principal financial and accounting officer from the date of appointment until Mr. Walker resumes his responsibilities. Prior to this appointment, Mr. Shahbazian previously served as the company's Interim CFO, Vice President, Finance from June 2011 through December 2011.