JPS6326425B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a work standard time calculation device.

In general, production factories, particularly factories where manual labor is the main activity, utilize standard work time (hereinafter simply referred to as standard time) to streamline productivity.

In particular, when the above-mentioned work involves a wide variety of work contents, such as sewing work,
Even a slight change in the thickness of the fabric used in a product or its surface condition can have a large effect on a certain work element of the work in question, resulting in a significant change in the work time required to perform the work in question. .

However, in the conventional standard time calculation method, each factor considered to affect work,
There is no sufficient consideration given to the degree of correlation with the individual work elements of the work concerned, and as a result, it is not possible to sufficiently follow changes in the surface condition of the cloth, etc. The disadvantage was that it was difficult to predict.

This invention was made to solve the above-mentioned drawbacks, and uses a large number of factor data that affect working time as independent variables, and uses actual working time data as a dependent variable to function as an additive type linear multivariate function. is assumed to be the formula for calculating the standard time, and the constants of the function and the coefficients (partial regression coefficients) corresponding to each variable are determined using the multiple regression analysis method. By calculating the standard time based on a calculation formula in which the degree of influence of the variation of each factor conforms to a predetermined standard value, it is possible to accurately determine the degree of influence of each factor that affects work on the standard time. It is an object of the present invention to provide a work standard time calculation device that is reflected in the calculated standard time, has very high accuracy, and has very high usability.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a standard time calculation device 1 according to the present invention.
shows. This standard time calculation device 1 includes an operation panel 2 on which various key switches are arranged, a CRT (cathode ray tube) 3 for displaying standard time calculation results and various commands in the calculation process, and a data recording floor. It is equipped with a tsupee disk 4 and a printer 5 for printing calculation results and the like. and,
Inside the standard time calculation device 1, as will be described in detail later, there are a CPU (central processing unit), ROM (read only memory), and ALU (logical arithmetic unit).
is provided.

In FIG. 2, 10 is a data key for inputting various data, 10-1 is a number and code key, and 10-2 is an alphanumeric character key.

11 is set (input) to the standard time calculation device.
This is a set of setting mode keys for specifying the type of data to be processed. After pressing one of the setting mode keys, press the key 10 above.
By pressing , data corresponding to the pressed setting mode key is input to the CPU of the standard time calculation device.

11-1 is a system key for setting data indicating criteria for multiple regression analysis results, 11-2
The actual work time related to the production work corresponding to the product name, process name, and instruction file name containing the instructions related to the production work is shown, and the data necessary for creating the actual work time data file is set. The performance key 11-3 is the name of the product, the process name, and the names of various factors that affect the production work, which correspond to the name of the instruction file related to the production work, and the numerical data corresponding to each factor name. This is a factor key for setting the data necessary to create a factor data file in which (factor data) is shown. In addition, after pressing the actual result key 11-2 or the factor key 11-3, among the data input to the CPU of the standard time calculation device using the key 10, the product name, process name, and instruction file name. , the factor name is input as an alphanumeric character or a code number, respectively.

Reference numeral 12 denotes an execution mode key for instructing to execute a predetermined operation in the standard time calculation process. 12-1 is an analysis key for instructing execution of a predetermined calculation in order to obtain a formula for calculating standard time using multiple regression analysis; 12-2;
is a calculation for instructing the execution of the calculation of standard time (expected standard time) related to arbitrarily specified production work according to the calculation formula for calculating standard time obtained using multiple regression analysis method. That's the key.

Reference numeral 13 denotes a group of keys for instructing various operations when performing various data input operations using the setting mode key 11 and keys 10.

13-1 is a modification key, and this modification key 13-1
This command is used to instruct correction of data to be registered in the actual work time data file and factor data file when the file is created.

13-2 is a list key, and this list key 13
-2 is a so-called hard copy that restores desired data among various data stored in the storage unit of the standard time calculation device 1.
This is for instructing the CRT 3 or printer 5 to display the image.

13-3 is the completion key, this completion key 13-3
means that after pressing one of the setting mode keys 11, the data input preparation operation (setting operation) to be input to the CPU using the key 10 is completed, or that the setting operation is interrupted. It is for commanding.

Reference numeral 13-4 is a data setting key, and this data setting key 13-4 is operated before performing a setting operation for one data using the keys 10 described above.

A clear key 13-5 is used to instruct erasure of data set using the key 10 before the data setting key 13-4 is pressed.

14 is a test key for instructing the execution of a self-diagnosis program of the standard time calculation device 1;
5 is a printer key for commanding the operation of the printer 5, and 16 is a key for external input commands.

FIG. 3 is a block circuit diagram of the standard time calculation device 1, and 21 is a first memory circuit that stores data used in multiple regression analysis. , data as shown in Table 1 are stored. These data may be input by key operation or by using an input device such as a punch card.

In addition, in the first memory circuit 21, the actual work time data by product name and by process name is stored as, for example,
Stored in the format shown in Figure 5a,
In addition, each factor name (factor number) and its factor data by product name, process name, and instruction number are as follows:
For example, it is stored in a format as shown in FIG. 5b.

22 is a first arithmetic circuit, and the first storage circuit 2
The constant _{a 0 and the} coefficients _{a 1 , a 2} ,
...A _p is calculated by multiple regression analysis method. That is, Y ₁ = a ₀ + a ₁ x ₁₁ + a ₂ x ₂ +...+a _p x _1p Y ₂ = a ₀ + a ₁ x ₂₁ + a ₂ x ₂₂ +...+ a _p x _2p 〓 Y〓=a ₀ + a _{1 x 1 + a 2 x 2 + ... + a p _ _ 2} ,...,y _o , the observed value y〓
Find a ₀ , a ₁ , a ₂ , ... a _p that minimizes the sum of squares of the residual between and the predicted value Y〓. In addition, x ₁ ,
x ₂ , . . . x _p are the factor data shown in Table 1.

The first arithmetic circuit 22 further calculates (A) the coefficient of variation H of the regression residual: H=y〓−Y〓/y〓×100, and the multiple correlation coefficient R shown in (B), (C). Partial correlation coefficient r _y1

Claims (1)

[Scope of Claims] 1. Data necessary for creating an actual work time data file, such as product name, process name and/or process number, instruction number, actual work time, etc., name of a factor that affects work, and numerical data corresponding to the name of the factor. , an input means for inputting judgment criteria, etc.; an instruction means for instructing to operate either the first calculation means or the second calculation means; displaying items, data, etc. at the time of input, and displaying various calculation results. a first storage means for storing the product name, process name and/or process number, instruction number, actual working time data, factor name, factor data, etc. input by the input means; Therefore, based on the data stored in the first storage means, the standard time is determined by multiple regression analysis using multiple sets of equations whose basic form is Y=a ₀ +a ₁ x ₁ +a ₂ x ₂ +...+a _p x _p . a first calculation means for calculating constants and coefficients of calculation formulas, coefficients of variation of regression residuals, multiple correlation coefficients, and partial correlation coefficients; a second storage means for storing judgment criteria input by the input means; determining means for determining whether the calculation result of the calculation means is within or outside of the determination criteria of the second storage means; and, if the result of the first calculation means is within the determination criteria, storing a standard time calculation formula based on the calculation result of the first calculation means; and a third storage means that stores the standard time calculation formula of the third storage means and the product name related to the target work according to the instructions of the instruction means.
A work standard time calculation device characterized in that the work standard time calculation device is characterized in that it estimates in advance the standard work time of scheduled work, comprising: a second calculation means for calculating the work standard time from the process name and/or process number, factor name, and factor data. .