STI - BIS

Scheme for Testing and Inspection (STI)

The Scheme of Testing and Inspection is a document which specifies the control over production process which the licensee is required to exercise for operating the certification marks licence.

The STI contains, inter alia the following provisions:

a) Markings to be applied on the product and the method of applying the Standard Mark

b) Definition of control unit

c) The levels of control to be applied

d) acceptance criteria, control unit wise

e) Frequency of sampling and tests on raw materials, in process materials and finished products

g) Directions to licensees in event of quality related problems

h) A clause requiring free replacement of goods in case a complaint is established bonafide.

i) Frequency of calibration of test equipments.

Note: Licence is granted to the applicant only after his acceptance to the STI document.

SUPERVISORY CONTROLS OVER LICENSEE'S PERFORMANCE

After the grant of licence, the manufacturer is authorized to mark his products on condition that he implements the STI fully, his products conform to the Indian Standard and he maintains a record of tests carried out.

Post certification controls are exercised through surveillance inspections at the licensees unit periodically. During these inspections, thorough technical auditing of the quality control system is carried out with reference to the STI document. Samples of current production are tested, and also drawn for testing in BIS or independent laboratories. The details of STIs related to various types of cement for cement plants having production capacity of above 600 tpd are given below for reference/downloading:--

Sl. No.	Product	IS No.	STI Doc. No.
1	OPC 33	269	STI/Doc.269/1/LS,May 2005
2	OPC 43	8112	STI/Doc.8112/1/LS, May 2005
3	OPC 53	12269	STI/Doc.12269/1/LS, May 2005
4	PPC	1489 (Pt.1)	STI/Doc.1489(Pt1&2)/1/LS,May 2005
5	Sulphate Resistant cement	12330	STI/Doc.12330/1/LS, May 2005
6	Portland Slag Cement	455	STI/Doc.455/1/LS,May 2005

SOURCE