Work process improvement of anchor bolt installation in concrete columns

Abstract

This research aims to improve J-type Anchor bolt installation in the column structure process. Determining the impact
of the joining process on those Anchor bolts and column bases, the work was concerned with the Overall Equipment
Effectiveness (OEE) data. Three major process indicators corresponded to the scale of OEE ; Availability, Performance,
and Quality rate. The use of jig and fixture has been a well-established approach to control the column base within the
standard position. All of the control points have been measured on the 3D axis, as 2D in the support plane and the
vertical level of the column base. Consequently, the problem of downtime loss due to the adjustment of column base
position was decreased. Complete one job installation of a column with 36 CM2
cross-section and 20m of the height,
took an averaged-cycle time of 22 minutes. Also, the before and after improvement of the process were compared
resulting to an increase in the rate of the first right job by 45 percent. Availability increased by 4%, Performance
increased by 5%, Quality rate increased by 4%. resulting in an overall equipment effectiveness increase of 11%,
and the Process Capability Index (CP
) was increased from 1.14 to 2.22 leading to suitable operating costs.