My apologies I'm reviewing this a bit late. But you have plenty of time still to go so I hope this review will be helpful. Also, please refer to this post where I listed my often repeated feedback for people and I hope you will take it in to consideration.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/ielts-writing-for-band-7-or-above.540392/page-90#post-7568485
Several in-house works in the past were done by human beings; however, with the passage of time, machines have taken over that role. There are certain positive and negative outcomes owing to this change in terms of time-management, human work load and cost related matters
and I am going to discuss them in this essay. No need for this line. Point 1.4 on my post above.
The introduction is fine. The one thing you could have done better is that you could have identified which one of the things listed in your introductions are positive and which are negative. That would have made this introduction much better. Right now you are assuming that reader should know which one are positive and which are negative developments in your second line. DO NOT ASSUME.
To talk about pros of this development first, food making in kitchens has become easier and quicker which allows one to use that time to enjoy with family and take care of children. For instance,
if one had not had a Weird phrasing
Microwave Oven in
the past to grill a chicken, he/she would have taken excessive amount of time to first setup the stove outdoors with coal, brick, etc..
but
But, now with electric or gas oven it is a matter of 30 minutes. Thus, food devices
has have helped many in cutting
the time required for food preparation.
It is okay. Nothing great, nothing bad. But there are grammar issues.
Another advantage is the cost
cutting Too many cuttings. Can you think of another word here? due to which humans have outsourced menial jobs of kitchen to machines. Preparing an ice cream or milk shake at home through food processors is nearly half of what it costs at food outlets. Take Baskin Robbins, for example, It costs around $10 a glass of mango shake; the same could be arranged at even lesser than half of the aforementioned price through the same machines they have been using in their branches. Hence, this is another positive outcome of machines over physical activity.
This paragraph is a waste. You are using same argument as in previous paragraph and just changing the object being made in kitchen. Waste of time and effort and no new perspective.
On the other side, there are disadvantages too of using machines and one them is reduction in physical activities. Crushing grains to flour in early days was considered a job to be done at home. Same was the case of converting black pepper grains to powdered form. These processes used to ensure an adequate amount of burnt calories for women. Hence, this is somewhat, I can say a drawback of technology based devices at homes.
Two paragraphs for advantages and only one for disadvantage and that too short. Point 2.3 on my post above. This argument is not even convincing. You really need to spend some time on idea generation. And why are all your examples in kitchen. Are there no other work done in home which is now done by machines. How about cleaning - vacuum cleaners? Gardening? There are so many. Spend some time in thinking about the topic.
To conclude, I can easily say that although physical effort has been reduced due to the arrival of machines at home; however, advantages like cost and time cutting certainly outweigh the aforementioned disadvantages.
Very weak conclusion. Read my post for more points on conclusion.
Overall, this is a weak attempt. You do not seem to have many issues in terms of Grammar or English but you really need to spend some time on task response and reading more. You have enough time to do so. All the best!