System and program for estimating person-hours required to prepare a pattern film of a circuit to be printed on a board

An estimation system for estimating person-hours required to prepare a pattern film for a printed circuit board based on a design condition, the estimation system comprising:

• a correction table for setting a correction coefficient in accordance with a total number of pins extending from parts to be integrated on a printed circuit board;
• a specification table for setting a specification coefficient in accordance with a special specification to be applied to the printed circuit board;
• a wiring method table for setting an increment/decrement coefficient in accordance with a wiring method of signal lines to be made on the printed circuit board;
• a difficulty table for setting a difficulty coefficient in accordance with a number of signal layers to be made on the printed circuit board, a number of signal lines arrangeable between adjacent pins and a pin density;
• a reference pin calculation unit for referring to the correction table to obtain a correction coefficient on the basis of a total number of pins indicated in the required design condition, referring to the specification table to obtain a specification coefficient on the basis of a special specification indicated in the required design condition, and multiplying the total number of pins, the obtained correction coefficient and the obtained specification coefficient to calculate a number of reference pins;
• an additional pin calculation unit for referring to the wiring method table to obtain an increment/decrement coefficient on the basis of a signal line wiring method indicated in the required design condition, and calculating a number of additional pins on the basis of the obtained increment/decrement coefficient;
• a total estimated pin calculation unit for referring to the difficulty table to obtain a difficulty coefficient on the basis of information included in the required design condition, and correcting a sum of the number of the reference pins and the number of the additional pins on the basis of the difficulty coefficient and a reuse rate of a preceding wiring pattern, to calculate a total estimated number of pins;
• and
• a person-hour calculation unit for calculating the person-hours required to prepare a pattern film of the printed circuit by dividing the total estimated number of the pins by an average number of pins handleable by a design engineer per a unit time.

A computer executed program operable:

• means for storing a correction table to set a correction coefficient in accordance with a total number of pins extending from parts to be integrated on a printed circuit board;
• means for storing a specification table to set a specification coefficient in accordance with a special specification to be applied to the printed circuit board;
• means for storing a wiring method table to set an increment/decrement coefficient in accordance with a wiring method of signal lines to be made on the printed circuit board;
• means for storing a difficulty table to set a difficulty coefficient in accordance with a number of signal layers to be made on the printed circuit board, a number of signal lines arrangeable between adjacent pins and a pin density;
• means for referring to the correction table to obtain a correction coefficient on the basis of a total number of pins indicated in a design condition, referring to the specification table to obtain a specification coefficient on the basis of a special specification indicated in the design condition, and multiplying the total number of pins, the obtained correction coefficient and the obtained specification coefficient to calculate a number of reference pins;
• means for referring to the wiring method table to obtain an increment/decrement coefficient on the basis of a signal line wiring method indicated in the design condition, and calculating a number of additional pins on the basis of the obtained increment/decrement coefficient;
• means for referring to the difficulty table to obtain a difficulty coefficient on the basis of information included in the design condition, and correcting a sum of the number of the reference pins and the number of the additional pins on the basis of the difficulty coefficient and a reuse rate of a preceding wiring pattern, to calculate a total estimated number of pins;
• and
• means for calculating person-hours required to prepare a pattern film of the printed circuit by dividing the total estimated number of the pins by an average number of pins handleable by a design engineer per a unit time.

An estimation apparatus comprising:

• first means for calculating a number of reference pins on the basis of a total number of pins extending from parts to be integrated on a printed circuit board and a special specification requirement to be applied to a printed circuit;
• second means for calculating a number of additional pins on the basis of a signal line wiring method used in preparing a pattern film of the printed circuit;
• third means for correcting a sum of the number of the reference pins and the number of the additional pins on the basis of design difficulty to calculate a total estimated number of pins;
• and
• fourth means for calculating person-hours required to prepare a pattern film of the printed circuit by dividing the total estimated number of the pins by an average number of pins handleable by a design engineer per a unit time.

An estimation method of estimating person-hours required to prepare a pattern film for a printed circuit board based on a design condition, the estimation method comprising the steps of:

• A) calculating a number of reference pins on the basis of a total number of pins extending from parts to be integrated on a printed circuit board and a special specification requirement indicated in the design condition;
• B) calculating a number of additional pins on the basis of a signal line wiring method indicated in the design condition;
• C) correcting a sum of the number of the reference pins and the number of the additional pins on the basis of design difficulty to calculate a total estimated number of pins;
• and
• D) calculating the person-hours required to prepare a pattern film of the printed circuit by dividing the total estimated number of the pins by an average number of pins handleable by a design engineer per a unit time.