Page 125 - IRSEM_Main Book

703. Detailed Estimates: On receipt of administrative approval to a project or scheme other
than that for which construction estimate in Form E. 553 is prepared and, conveyed through
the sanction to the abstract estimate relating thereto detailed estimates for various works
should be prepared and submitted for technical sanction of the competent authority. It
should be prepared in sufficient detail to enable the competent authority to make sure that
the abstract estimate sanctioned by a higher authority is not likely to be exceeded. No work
included in an abstract estimate should be commenced till a detailed estimate for the same
is prepared and sanctioned and adequate funds are allotted by the competent authority. The
detailed estimate of an open line work will comprise (i) statements showing details of
estimated cost and (ii) an outer sheet giving the abstract of cost of work, the report, the
financial justification and the allocation.

Note: (1) Technical Sanction - The sanction of the competent authority to the detailed estimate
of a work is called the "technical sanction". The authority according technical
sanction should satisfy itself that (i) the details of the scheme as worked out are
satisfactory, (ii) the methods proposed for the execution of the work are adequate;
and (iii) the cost has been estimated from reliable data and is likely to be reasonably
accurate.

(2) In the case of works within his power of sanction, the General Manager may, in lieu
of the procedure of preparing Abstract Estimates for administrative approval,
prescribe that both the administrative approval and the technical sanction should
be accorded on the detailed estimates.

707. A supplementary estimate should be prepared for any item of work, which ought to
have been included in the first instance in an estimate already sanctioned but has not been
so included, or which it is found later, should be considered as being a part or a phase of an
estimate already prepared and sanctioned, if it cannot be met out of contingencies (see
paragraph 727). Such, a supplementary estimate should be prepared in the same form and
the same degree of detail as the main estimate and for all purposes be treated as a part of
the main estimate.

708. Revised Estimate: As soon as it becomes apparent that the expenditure on a work or
project is likely to exceed the amount provided therefore in the detailed estimate or
construction estimate a revised estimate should (subject to provision of paragraph 1336) be
prepared and submitted for the sanction of the competent authority. It should, unless
otherwise ordered by the sanctioning authority, be prepared in the same form and the same
degree of detail as the original estimate and should be accompanied by a comparative
statement showing the excess or saving under each sub-head of account against the latest
sanction. In cases where a supplementary estimate; or a previous revised estimate has been
sanctioned by the Railway Board, it should be made clear how the original sanction has been
modified by such further sanctions.

Chapter 5: Planning, Estimating & Survey Page 97 of 535