Master strategy adjustment method and disc manufacturing method

A disc manufacturing method comprising:

• performing first recording with regard to a disc master in a state where a predetermined writing strategy is set;
• performing first measurement of an evaluation value which is an evaluation indicator of signal quality with regard to a signal which is recorded with regard to the disc master in the performing of first recording;
• forming a first optical disc recording medium based on the disc master where recording has been performed in the performing of first recording;
• performing second measurement of an evaluation value with regard to a recording signal of the optical disc recording medium which was formed in the forming of the first optical disc;
• calculating of a target value of the evaluation value with regard to the disc master based on a difference with the evaluation value which was measured in the performing of first measurement and the evaluation value which was measured in the performing of second measurement;
• adjusting the writing strategy which was set in the performing of first recording so that the evaluation value with regard to the disc master matches the target value, performing recording with regard to the disc master in a state where the adjusted writing strategy is set, performing measurement of the evaluation value with regard to the recording signal of the disc master, and performing a process, where it is determined whether or not the evaluation value which has been measured is at least a value within a predetermined range with the target value set as a reference, until an affirmative result is able to be obtained in the determination;
• performing third recording with regard to the disc master in a state where the strategy is set based on the writing strategy which is set when the affirmative result was obtained in the determination;
• and
• forming a third optical disc recording medium based on the disc master where recording has been performed in the performing of third recording.