Here we use the following notations:

• SI — sources of income (shares in construction of houses);
• PPI — payback period of investment.

     General properties of the task:

• task type — 7;
• payback factor — return on investment;
• option of SI behavior on initial ranges of their exploitation:
  • changing specific income from exploitation (option 1);
  • random delay of the start of exploitation (option 2);
• the need for statistical modeling:
  • for option 1 — not is;
  • for option 2 — is.

     Given:

• for option 1:
  • number of investment options, for each of them are given:
    • investment amount, which consists of two parts:
      • investor's own funds;
      • credit funds, involved by him;
  • interest rate on the loan;
  • payback parameters:
    • PPI;
    • rate of return during PPI on the consumed investment amount;
  • number of SI types, for each of them are given:
    • SI sample description;
    • minimum and permissible numbers of being acquired SI samples;
    • cost of one SI;
    • expected specific income (per time unit) from exploiting one SI in stationary mode;
    • number of points of a tabular function of reduction ratio for specific income from SI non-stationary exploitation, for each of them are given:
      • value of argument: a current time of SI exploitation;
      • value of function;
• for option 2:
  • investment amount, which consists of two parts:
    • investor's own funds;
    • credit funds, involved by him;
  • interest rate on the loan;
  • payback parameters:
    • PPI;
    • maximum and minimum values of a rate of return during PPI on the consumed investment amount;
    • number of its values;
  • number of SI types, for each of them are given:
    • SI sample description;
    • minimum and permissible numbers of being acquired SI samples;
    • cost of one SI;
    • expected specific income from exploiting one SI in stationary mode;
    • number of points of a tabular function of distributing a random delay of the start of SI exploitation, for each of them are given:
      • value of argument: a current time of owning SI;
      • value of function.

     Maximized quality criterion: relative income (per time unit) from SI exploitation.