This Study Develop the Formula For the Production Rate When the Work Station Is More Than 5-Station In Assembly Line Production Line from Alternate Formula Production Rate Are Known and Standard Deviation of Correction Factor (Error from the Actual Production Rate “R” to the to the Alternate Formula Production Rate “Afr” Are Known from 5- Work Station) Are Known. This Formula Is Near About Correct to Calculate the Higher (More Than 5- Work Station) Work Station In Production Lineassembly Line For Calculating the Production Rate In Un-Paced Production Line.