2. The apparatus as claimed in claim 1 , wherein the processor further implements a management unit configured to record set delivery periods set by the delivery period setting unit for translations of original texts in association with actual delivery periods of the translations of the original texts, calculate an average of differences between the set delivery periods and the actual delivery periods, and if the average of differences is greater than a predetermined threshold, modify the coefficients in the coefficient table.
2. The apparatus as claimed in claim 1 , wherein the processor further implements a management unit configured to record set delivery periods set by the delivery period setting unit for translations of original texts in association with actual delivery periods of the translations of the original texts, calculate an average of differences between the set delivery periods and the actual delivery periods, and if the average of differences is greater than a predetermined threshold, modify the coefficients in the coefficient table. 3. The apparatus as claimed in claim 2 , wherein the management unit is further configured to record translation companies and/or translation languages in association with the set delivery periods and the actual delivery periods; and the storage unit is configured to store the coefficient tables for the respective translation companies and/or the translation languages.