Reasons for need of development of the Electronic textbook on the discrete mathematics

The electronic textbook on the discrete mathematics will allow students to study materials in this subject and as to check the knowledge by means of testing. The teacher in turn can use results of tests for an assessment of knowledge of students.

Basic data for calculation are provided in the table 4.1.

Table 4.1 – Initial Data

Index name	The conditional designation	Measurement unit	Numerical value
Monthly salary of the programmer	Д окл	Tenge
Working week	РН	Days
The number of hours, allocated for daily scheduled maintenance	t prof. Change	Hours/Days
The number of hours, allocated for monthly scheduled maintenance	t prof. Month	Hours/Months
The number of hours, allocated for annual scheduled maintenance	t prof. Year	Hours/Years
Award size	П	%
Norm of buffer action on inventory	Н Ам equipment	%
Norm of buffer action on buildings	Н Ам Building	%
Coefficient of expenses for maintenance	К тр		0,2
Rate of return	Н п	%

Second Part of Table 4.1

Name of an index	The conditional designation	Measurement unit	Numerical value
Number of illuminants on 1 workplace	N L	number
Cost is 1 KWh	C	tenge	13,0
Power of one lighting device	N main	W	0,07
Power of a unit of equipment	N sum	W	0,7
Area of one workplace	S	m^2
Room height	h	m	2.7
Cost 1m^3 buildings	C m^3	tenge
The cost of used inventory	C sum	tenge
Monthly salary of the operator	D op	tenge

Calculation of the conditional number of operators.

Function-oriented documents measure the software product and process of its development. For an assessment of complexity of the software product four informational characteristics are used: external inputs, inquiries, internal logical files. They allow to estimate the program in the conditional operators. The considered program has the following characteristics:

I External inputs:

- searching;

- sending messages;

- sending answers on testing;

- authorization;

- filing;

In total 5

II External conclusions:

- conclusion of the chosen lectures

- main page;

- conclusion of test tasks;

- glossary;

In total 4

III Inquiries:

- obligatory fields for input and output of data for reports on testing

- obligatory fields for saving of new data

In total 2

IV Internal logical files:

- reports on testing;

- lecture materials;

- test materials;

- sending messages;

Quantity: 4

Table 4.2 of the Characteristic of the program

№ п/п	Characteristic	Complexity	Quantity
	Inputs
	Conclusions
	Requests	3.5
	Logical files	4.2

The functional characteristic of FP pays off on a formula:

FP = ∑Ci*Ki, i=1,…7, (4.1)

where Ci – complication, Ki – number of elements.

FP =4*7+4*6+3.5*2+4.2*3=71,6

The quantity of the conditional statements is calculated on a formula:

Q = FP*K, (4.2)

where FP – the functional characteristic, To – coefficient of recalculation which depends on a programming environment, for JavaScript K=9:

Q = 71,6*9=644,4

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