Analysis of the Level of Importance and Ease of Implementing Lean Construction in Building Construction Projects in Aceh Province, Indonesia

implementation


Introduction
Lean construction is a construction implementation method that tries to minimize waste and maximize value.Waste is all forms of waste, while value is the value that should be achieved in the project.Thus, lean construction does not aim to streamline construction forms.[3][4] There are no regulations regarding the implementation of lean construction; the implementation of building construction projects, especially in Aceh Province, is still a very profitable waste and neglected value.This is because there are still many contractor companies that adhere to conventional or traditional implementation methods.
produce waste and neglected value.As for form waste, which commonly arises in building construction projects, such as waiting time for instructions, waiting time for materials to arrive, waiting time for tools to arrive, loss of materials/equipment at the site, waste of materials and raw materials, damage to materials and ingredients at the site, idle labor, errors in work instructions, slow/ineffective workers, work rework/repair, and work accidents occur.Neglected form value in building construction projects, such as low quality of work and delays in project completion. 5- 9 his study aims to analyze the importance and ease of implementation of lean construction on a building construction project in Aceh Province, Indonesia.

Methods
This research uses a quantitative method approach.Quantitative methods were used to examine respondents through questionnaire data collection.
The object of this research is a building construction project.The criteria for building construction projects reviewed are those that have been completed by

Results and Discussion
Table 1 shows the indicators for the level of importance and ease of implementation of lean construction.All of them are valid because they have the value Rcount > Rtable.This means that based on the perceptions of 30 contractor company personnel, 47 indicators are implemented lean construction is appropriate or appropriate to review for building construction projects in Aceh Province.Table 2 shows that the variables are the level of importance and ease of implementation.Lean construction has a value Cronbach Alpha > 0,6 so that variable is reliable.This means that based on the perceptions of 30 contractor company personnel, all indicators are of a level of importance, and ease of implementation of lean construction is representative of the variable.Characteristics of 21 non-small qualified contractor company personnel, all of whom are male, predominantly aged 41-50 years, highest education level S1, company position at level project manager and site engineer, and the number of building construction projects that have been built is 7-9 projects.Perceptions of small and non-small contractor company personnel's partial qualifications towards the level of importance and ease of implementation of lean construction have different evaluations.This is because a person's perception is influenced by subjective ways of thinking and feeling.
These different perceptions can be accommodated through values mean, which is completed through descriptive statistics.Based on the perception of partially qualified small and non-small contractor company personnel, a modified IPA analysis can then be applied.The analysis of modified IPA in the context of this discussion aims to determine the percentage of suitability of readiness, the difference in readiness, and the level of readiness in implementing lean construction on building construction projects in Aceh Province according to the perception of small and nonsmall qualifying contractor companies partially.
Readiness suitability (TKi) is a condition where partially small and non-small qualifying contractor companies perceive the level of ease as being the same as the level of importance of implementing the indicators of lean construction.1][12][13][14] The suitability of readiness and the difference in readiness for implementation of lean construction on building construction projects in Aceh Province, according to the perception of small and non-small contractor companies, the partial qualifications can be shown in Table 3.
Table 3 shows that there is the same perception between small and non-small qualifying contractor companies regarding the sequence suitability of readiness for implementation indicators for lean construction projects in Aceh Province for ranks 1-4.
The indicator with the first ranking is the first attempt at process execution, where the conformity of readiness of small qualification contractor companies is 148.99% with a gap value of 1.281, while non-small qualifications are 146.15% with a gap value of 1.143.
The indicator with the second-ranking is producing in small quantities, where the conformity of readiness of small qualified contractor companies is 144.59% with a gap value of 1.158, while non-small qualifications are 136.73%with a gap value of 0.857.Personnel from small and non-small qualifying contractor companies in this study totaled 78 respondents.Characteristics of 78 personnel from small and non-small qualifying contractor companies, all of whom are male, predominantly aged 31-40 years, with a bachelor's degree, company position site engineer, and the number of building construction projects that have been built is 7-9 projects.
Perceptions of small and non-small qualifying contractor company personnel simultaneously towards the level of importance and ease of implementation of lean construction have different evaluations.This is because a person's perception is influenced by subjective ways of thinking and feeling.
These different perceptions can be accommodated through values mean, which is completed through descriptive statistics.Based on the simultaneous perception of qualified small and non-small contractor company personnel, modified IPA analysis can then be applied.The analysis of modified IPA in the context of this discussion aims to determine the percentage of suitability of readiness, the difference in readiness, and the level of readiness in implementing lean construction on building construction projects in Aceh Province according to the perception of small and nonsmall qualifying contractor companies simultaneously.Readiness suitability (TKi) is a condition where small and non-small qualifying contractor companies simultaneously perceive the level of ease as equal to the level of importance of implementing the indicators of lean construction.6][17][18] The suitability of readiness and the difference in readiness for implementation of lean construction on building construction projects in Aceh Province, according to the perception of small and non-small contractor companies, the qualifications simultaneously can be shown in Table 4.
Table 4. Conformity of readiness and implementation differences in lean construction according to the perception of small and non-small qualifying contractor companies simultaneously.

No. Lean construction Implementation Indicators
waste that have the potential to occur and focuses on increasing work productivity during the construction project implementation cycle.After the Central Government introduced the method of lean construction in 2016, implementation regulations have not been issued, as have regulations governing the implementation of sustainable construction.The implementation of sustainable construction is regulated in the Regulation of the Minister of Public Works and Public Housing of the Republic of Indonesia, Number 9 of 2021.This regulation states funding sources from the 2017-2023 Aceh Revenue and Expenditure Budget (APBA), and have a contract value of > 1 billion rupiah.A total of 78 research objects were included in this study.The questionnaire instrument was designed based on 2: Part A questionnaire was designed to ask about the characteristics of the respondent.Part A of the questionnaire includes 6 indicators, namely gender, age, highest level of education, company position, company qualifications, and number of building construction projects ever built.Answers to part A of the questionnaire are measured according to the respondent's personality.Part B of the questionnaire was designed to ask about the level of importance and ease of implementation of lean construction on the project construction building in Aceh Province.As for implementation indicators, lean construction can be seen in implement): Implementation Lean construction whose readiness needs to be improved in low priority there are 4 indicators.The indicator is analysis 5whys to find the root cause of a problem, a fishbone diagram to find the root cause of a problem, an analysis of failure modes and impacts, and a Pareto analysis to find out cause and effect.4) Quadrant D (not important and easy to implement): Implementation Lean construction There are 4 indicators whose readiness does not need to be increased.These indicators are prefabrication, first trial for process execution, work site layout design, and production in small quantities.

Table 2 .
Each indicator is assessed for the level of importance (Y) and level of convenience (X).Answers to part B of the questionnaire are measured using a valid and variable reliable, then the direct questionnaire design can be used as a research data collection tool.However, if there are invalid indicators, then the questionnaire design must be modified.Importance performance analysis (IPA) is used to evaluate the percentage of readiness compliance, readiness difference, and level of implementation readiness lean construction on building construction projects in Aceh Province based on the level of importance and convenience of small and non-small contractor companies partially and simultaneously.

Table 3 .
Conformity of readiness and implementation differences lean construction according to the perception of small and non-small qualifying contractor companies partially.