Today we are living in the era of fourth industrial revolution demanding variet y of skills set for delivering various jobs. The world is transforming in a contingent way. This transformation is not only in terms of technology but a complete domino effect is being witnessed in the recent past. The technology, demography and the social changes are affecting the professional as well as personal life styles. The techniques and procedures followed in the organizations are becoming obsolete very quickly resulting in the need for new techniques. New jobs are created; even the most demanded j obs in the current days are not even present few years back. Thus the job description and the job specification is changing a lot these days. It is not the survival that is threatening the employee work force but it is about the sustenance of their jobs. Learnability is the skill that is coming to the aid of employees for sustenance. Learnability is the ability to quickly grow and adopt skill set to be emploayable throughout their working life. In this regard this study is aimed to identify the need of learnability skill among the people and how it affects their career. A survey was conducted with a sample of 120 employees working in different sectors to identify the need to unlearn the present skill set and relearn the new skills for their job upgradation. The study revealed that unlearning and relearning is needed in every sector like educational institutions, software, manufacturing, fast moving consumer goods etc,. The time span for the change process varies from one sector to the other. The employees se eking new skills are being headhunted by the corporate world and are reaching the tip of their career ladder and the others are left behind. Keywords: Learnability, Industry 4.0, Sustenance, Skills Cite this Article: T. Mary Jones and K. Prasanth Kiran , Learnability: An Inevitable Skill Needed for Sustenance in Industry 4.0 , International Journal of Advanced Research in Engineering and Technology (IJARET), 11 (3), 2020, pp 152-161. http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=3 Learnability: An Inevitable Skill Needed for Sustenance in Industry 4.0 http://www.iaeme.com/ IJARET/index. asp 153 editor@iaeme.com 1. INTR ODUCTION The industrial sector is in fourth industrial revolution popularly known as Industry 4.0. Industry 4.0 is connecting the real and the virtual worlds resulting in production systems which are cyber physical production systems. Thus the manufacturin g sector is experiencing a huge transformation in manufacturing. Figure 1 The transformation is coercing the employees to learn many things to suit to the changes made in the industry. Thus the attribute learnability has become the basic requisite in th e present days to survive in the industry. An employee is expected to develop in 360 degrees to remain demanded in the professional environment. Fourth industrial revolution is expecting to change the social learning process and the way the tasks are being done in the organization. Basically Learning is an unavoidable and inseparable process with in the journey of any species on this earth and especially for the human beings it is the need of the hour. Because for all the species rest of the human beings th is learning is only for survival but only for human beings it’s not only survival but also sustenance in their field where they exist or work. One has to invite the change in to one’s life, this is willingness to learn and the ability t o adapt the changing scenarios in one’s job or life. Once market leader in the field of mobile phones and today it is no more, just because of the company missed out the learning and eventually it lost its business. The company didn’t do anything wrong, but it could not upda te to the contemporary developments which made the company disappeared. This was the case of the great NOKIA at once. Change – Growth – Improvement - Development We want to grow , improve and finally develop ourselves. What is development - normally speakin g it is a betterment from yesterday to today and from today to tomorrow. This can’t be taken place without the continuous learning or life long learning which means learn – unlearn & relearn, but we don’t notice this change. In the name of updating and upg rading of our skills we unlearn the old methods and switch to new and better methods in the name of relearning but we don’t name it is a relearn. Learning is defined as th e relative permanent change in the knowledge of a person or behavior due to experienc e. The three features defined are : T. Mary Jones and K. Prasanth Kiran http://www.iaeme.com/ IJARET/index. asp 154 editor@iaeme.com  The change is long -term rather than short -term;  The locus of the change is the content and structure of knowledge in memory or the behavior of the learner;  The cause of the change is the learner’s experience in the env ironment rather than fatigue, motivation, drugs, physical condition or physiologic intervention.” –From Learning in Encyclopedia of Educational Research, Richard E. Mayer I am still learning – Michel Angelo Michelangelo, who is renowned for sculpture, pai nting, poetry and architecture at the age of 87 is proclaiming about the need of learning. Thus we should all make learning as a continuous process in our life and be a life long learner. The Lifelong learning is the continuous pursuit of knowledge in a v oluntary and self - motivated manner. It improves the self -sustainability, employability and individual development among the people. 2. REVIEW OF LITERATURE : Learning is the process of acquiring new or modified knowledge, behaviours, skills or p