Salah satu usaha yang dapat dilakukan dalam rangka mengurangi angka kecelakaan kerja yang disebabkan oleh human error adalah dengan menggunakan metode yang mengukur kontribusi tenaga kerja terhadap suatu resiko kerja. Metode ini dikenal sebagai Metode Human Reliability Assesment (HRA). Pada kesempatan ini  akan digunakan salah satu dari metode HRA yaitu metode Human Error Assessment and Reduction Technique (HEART) yang merupakan metode untuk melakukan kuantifikasi human reliability. Analisis  HRA dengan metode HEART ini mengambil tempat di salah satu lini perakitan PT. ABC yang merupakan salah satu perusahaan manfaktur kelas dunia. Pada lini perakitan di PT. ABC ditemukan beberapa task yaitu 7.1, 14.1 dan 16.1 dimana dari hasil analisis dengan menggunakan metode HEART diperoleh nilai 1 untuk Nilai Human Error Probabilitynya.  Task tersebut memiliki karakteristik pekerjaan yang kompleks dan membutuhkan tingkat pemahaman dan keterampilan tinggi serta dari hasil EPC’S  operator hanya memiliki waktu singkat untuk mendeteksi kegagalan dan tindakan koreksi. Adapun saran untuk task’s tersebut adalah: Petugas yang mengerjakan task’s tersebut merupakan petugas yang telah terlatih dan telah bertugas/ menyelesaikan tingkatan tugas yang kesulitannya di bawah task’s tersebut (dibuktikan dengan matrix skill), Penggunaan APD yang sesuai khususnya bagi task 7.1 dan 14.1 untuk melindungi dari kemungkinan cedera tergores. Pengalokasian tempat yang cukup bagi manuver petugas untuk taks 16.1. Untuk menghindarkan kemungkinan terjadinya kejadian terjepit, selain itu perlu tindakan berkelanjutan khususnya dalam pemantauan HEP misal HEP yang terbesar selanjutnya dikombinasikan dengan metode lain seperti line balancing sehingga didapatkan kondisi Lini Produksi yang nyaman bagi para pekerja.

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One of the manual matrial handling jobs is the derivative work from the top of the truck. In working the workers use a tool that enggrong which is a short-handed shovel. Due to the use of employee enggrong work with stooped posture. This work posture raises the potential for low back pain in workers. This study is a cross sectional study with a sample of 9 participants. The purpose of research is to find potential risks of low back pain based on angle trunk when workers work sent down the sand by enggrong. Angle trunk which is predicted covering: 1 angle trunk flexion, 2) angle trunk bending, and 3) angle trunk twisting. Work posture data was taken using Microsoft KinectTM 3D camera and analyzed by using Siemen Jack 3D Static Strength Prediction Program (3DSSPP) software to predict angle trunk. The result of the analysis of the 6 work postures showed that worker's frequently employed posture had the average angle trunk flexion of 61.10 ± 10.090, angle trunk bending of 19.80 ± 6.740 and angle trunk twisting of 20.00 ± 9.030. The average angle trunk flexion at 87.28% of maximal angle is a major cause risk low back pain. So that it can be summed up the potential for low back pain on sand workers. Intervention ergonomics need to prevent and reduce potential risks happened low back pain on sand workers.

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Material handling manual work is a job at risk to worker health and safety, errors in the manual procedure of manual material handling will result in health impacts in the short and long term. One of the manual jobs of material handling is the job of lowering the sand from the top of the truck. In working the workers use a tool in the form of enggrong which is a shovel with a short handle. Due to the use of employee enggrong work with a stooped posture. This work posture raises the potential for low back pain on workers. Low back pain is a pain and/or loss of workability as a long-term risk of postural errors in activity. Low back pain occurs on low back disc L4 / L5 or L5 / S1. This study used treatment by the same subject design with a sample of 9 participants. The purpose of the study was to find out the different forces in Low back disc L4 / L5 when the worker worked using standard enggrong (Period 1 / P1) compared to using modification enggorong (Period 2 / P2). The forces in the L4 / L5 Low back disc include 1) compression, 2) anterior/posterior shear, and 3) lateral shear. Work posture data was taken using Microsoft KinectTM 3D camera and analyzed by using Siemen Jack 3D Static Strength Prediction Program (3DSSPP) method to get the force on the low back disc. The results of the analysis of the 6 work postures P1 and P2, showed a significant decrease (p <0.05) in the average compression force in the low back disc L4 / L5 on the work posture using modified enggrong. Enggrong modification lowers compression in low back disc L4 / L5 by 38.73% (P1 2143.8 ± 411.3 N; P2 1320.2 ± 418.4 N), anterior / posterior shear 46.17% (P1 542, 6 ± 103.9 N, P2 292.1 ± 81.2 N), and lateral shear 29.69% (P1 31.2 ± 22.08 N; P2 16.6 ± 14.28 N) compared with the use of enggrong standard. The threshold value for compression 3400 N and anterior / posterior shear is 700 N, then the compression and anterior / posterior shear values in Period 2 are well below the threshold. Decrease in the press force in low back disc L4 / L5 is as a result of changes in work posture workers who work using modification enggrong. It can be concluded that the use of modification enggrong can decrease the compressive force in the low back disc L4 / L5 so as to reduce the low back pain occurs to the workers.