Authors :
Yoppy Setyo Duto; Rosalendro Eddy Nugroho
Volume/Issue :
Volume 8 - 2023, Issue 3 - March
Google Scholar :
https://bit.ly/3TmGbDi
Scribd :
https://bit.ly/3JQfALZ
DOI :
https://doi.org/10.5281/zenodo.7747494
Abstract :
The increase in the number of national
electricity customers which is increasing every year must
be followed by the availability of sufficient supply of
electrical energy from power plants so that there is no
energy deficit. Maintenance and overhaul activities are
carried out routinely on power plant main equipment so
that it continues to be reliable and efficient. Turbine
Inspection (TI) overhaul activity at a Gas Turbine
Combined Cycle Power Plant is a type of periodic
inspection activity carried out at the power unit operated
by PT IP. Data on the history of TI overhaul
implementation during the 2016 - 2021 period shows that
there was a delay in completing the overhaul which
resulted in loss of production opportunity. Identification of
the causes of waste (waste) is carried out using a lean
approach with a combination of the use of Root Cause
Failure Analysis (Fishbone and 5W+1H) and Value
Stream Mapping (VSM) tools. The primary data in this
study is the result of direct field observations and
interviews with experts. Secondary data comes from
previous TI overhaul implementation history data. The
results of data analysis are used to make Current State
Mapping (CSM) including the potential for existing waste.
Decreasing the duration of TI overhaul is more focused on
Critical Path activities which have elements of waste and
have a significant influence on the total duration of TI
overhaul work. Activity identification falls into the NonValue Added (NVA) category, and Necessary Non-Value
Added (NNVA) is used as the basis for making Future
State Mapping including corrective steps that must be
taken to optimize the overhaul duration to be used in the
next OH TI. The total duration of the next TI overhaul,
namely GT 4.2 TI 2022 after the implementation of the
FSM and all improvement steps that have been made, is
close to the standard duration given by the manufacturer,
which is 22 days.
Keywords :
Turbine Inspection (TI), Loss Production Opportunity, Waste, Lean, Value Stream Mapping
The increase in the number of national
electricity customers which is increasing every year must
be followed by the availability of sufficient supply of
electrical energy from power plants so that there is no
energy deficit. Maintenance and overhaul activities are
carried out routinely on power plant main equipment so
that it continues to be reliable and efficient. Turbine
Inspection (TI) overhaul activity at a Gas Turbine
Combined Cycle Power Plant is a type of periodic
inspection activity carried out at the power unit operated
by PT IP. Data on the history of TI overhaul
implementation during the 2016 - 2021 period shows that
there was a delay in completing the overhaul which
resulted in loss of production opportunity. Identification of
the causes of waste (waste) is carried out using a lean
approach with a combination of the use of Root Cause
Failure Analysis (Fishbone and 5W+1H) and Value
Stream Mapping (VSM) tools. The primary data in this
study is the result of direct field observations and
interviews with experts. Secondary data comes from
previous TI overhaul implementation history data. The
results of data analysis are used to make Current State
Mapping (CSM) including the potential for existing waste.
Decreasing the duration of TI overhaul is more focused on
Critical Path activities which have elements of waste and
have a significant influence on the total duration of TI
overhaul work. Activity identification falls into the NonValue Added (NVA) category, and Necessary Non-Value
Added (NNVA) is used as the basis for making Future
State Mapping including corrective steps that must be
taken to optimize the overhaul duration to be used in the
next OH TI. The total duration of the next TI overhaul,
namely GT 4.2 TI 2022 after the implementation of the
FSM and all improvement steps that have been made, is
close to the standard duration given by the manufacturer,
which is 22 days.
Keywords :
Turbine Inspection (TI), Loss Production Opportunity, Waste, Lean, Value Stream Mapping
