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Total Non-Productive Time using Average Production Cost Formula

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Non Productive Time refers to the periods during the manufacturing process when the machine or operator is not engaged in active cutting or material removal. Check FAQs

T np = \frac{N b \cdot (C pr - C t \cdot t m) - (C t \cdot N t \cdot t c) - (N t \cdot C t)}{C t}

T_np - Non Productive Time?N_b - Batch Size?C_pr - Production Cost of Each Component?C_t - Cost of a Tool?t_m - Machining Time?N_t - Number of Tools Used?t_c - Time to Change One Tool?

Total Non-Productive Time using Average Production Cost Example

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With units

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Here is how the Total Non-Productive Time using Average Production Cost equation looks like with Values.

Here is how the Total Non-Productive Time using Average Production Cost equation looks like with Units.

Here is how the Total Non-Productive Time using Average Production Cost equation looks like.

0.9 = \frac{2 \cdot (11400 - 80 \cdot 1.15) - (80 \cdot 3 \cdot 0.5) - (3 \cdot 80)}{80}

0.9min = \frac{2 \cdot (11400 - 80 \cdot 1.15min) - (80 \cdot 3 \cdot 0.5min) - (3 \cdot 80)}{80}

0.9 = \frac{2 \cdot (11400 - 80 \cdot 1.15) - (80 \cdot 3 \cdot 0.5) - (3 \cdot 80)}{80}

Tip: Use pencil () icon above to edit Input Values and Units.

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Total Non-Productive Time using Average Production Cost Solution

Follow our step by step solution on how to calculate Total Non-Productive Time using Average Production Cost?

FIRST Step Consider the formula

T np = \frac{N b \cdot (C pr - C t \cdot t m) - (C t \cdot N t \cdot t c) - (N t \cdot C t)}{C t}

Next Step Substitute values of Variables

∴

T np = \frac{2 \cdot (11400 - 80 \cdot 1.15min) - (80 \cdot 3 \cdot 0.5min) - (3 \cdot 80)}{80}

Next Step Convert Units

∴

T np = \frac{2 \cdot (11400 - 80 \cdot 69s) - (80 \cdot 3 \cdot 30s) - (3 \cdot 80)}{80}

Next Step Prepare to Evaluate

∴

T np = \frac{2 \cdot (11400 - 80 \cdot 69) - (80 \cdot 3 \cdot 30) - (3 \cdot 80)}{80}

Next Step Evaluate

∴

T np = 54s

LAST Step Convert to Output's Unit

∴

T np = 0.9min

Total Non-Productive Time using Average Production Cost Formula Elements

Variables

Non Productive Time

Non Productive Time refers to the periods during the manufacturing process when the machine or operator is not engaged in active cutting or material removal.

Symbol: T_np

Measurement: TimeUnit: min

Note: Value should be greater than 0.

Batch Size

Batch size refers to the number of identical parts produced in a single production run or cycle.

Symbol: N_b

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Production Cost of Each Component

Production cost of each component involves accounting for various factors, including material costs, labor, machine operating costs, tool costs, overhead, and other related expenses.

Symbol: C_pr

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Cost of a Tool

Cost of a tool is a multifaceted consideration that includes the initial purchase price, maintenance costs, tool life, and the impact on overall production costs.

Symbol: C_t

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Machining Time

Machining time refers to the total time required to complete a specific machining operation on a workpiece.

Symbol: t_m

Measurement: TimeUnit: min

Note: Value should be greater than 0.

Number of Tools Used

The Number of Tools Used is the total number of tools used for manufacturing a batch of products.

Symbol: N_t

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Time to Change One Tool

Time to change one tool often referred to as tool change time, includes the duration taken to remove the used tool and install a new one.

Symbol: t_c

Measurement: TimeUnit: min

Note: Value should be greater than 0.

Credits

Creator Image

Created by Kumar Siddhant

Indian Institute of Information Technology, Design and Manufacturing (IIITDM), Jabalpur

Kumar Siddhant has created this Formula and 400+ more formulas!

Verifier Image

Verified by Parul Keshav

National Institute of Technology (NIT), Srinagar

Parul Keshav has verified this Formula and 400+ more formulas!

Other formulas in Average Production Cost category

Go Number of Tools used given Average Production Cost

N t = N b \cdot \frac{C pr - C t \cdot (t s + t m)}{C t \cdot t c + C t}

Go Number of Tools used given Average Production Time

N t = N b \cdot \frac{t p - (t s + t m)}{t c}

See More

How to Evaluate Total Non-Productive Time using Average Production Cost?

Total Non-Productive Time using Average Production Cost evaluator uses Non Productive Time = (Batch Size*(Production Cost of Each Component-Cost of a Tool*Machining Time)-(Cost of a Tool*Number of Tools Used*Time to Change One Tool)-(Number of Tools Used*Cost of a Tool))/Cost of a Tool to evaluate the Non Productive Time, The Total Non-Productive Time using Average Production Cost refers to the cumulative duration during which the manufacturing process is not actively producing parts. This includes any downtime, setup time, tool changes, maintenance, and other activities that do not directly contribute to the production of components. Understanding and minimizing non-productive time is essential for optimizing production efficiency and reducing overall manufacturing costs. Non Productive Time is denoted by T_np symbol.

How to evaluate Total Non-Productive Time using Average Production Cost using this online evaluator? To use this online evaluator for Total Non-Productive Time using Average Production Cost, enter Batch Size (N_b), Production Cost of Each Component (C_pr), Cost of a Tool (C_t), Machining Time (t_m), Number of Tools Used (N_t) & Time to Change One Tool (t_c) and hit the calculate button.

FAQs on Total Non-Productive Time using Average Production Cost

What is the formula to find Total Non-Productive Time using Average Production Cost?

The formula of Total Non-Productive Time using Average Production Cost is expressed as Non Productive Time = (Batch Size*(Production Cost of Each Component-Cost of a Tool*Machining Time)-(Cost of a Tool*Number of Tools Used*Time to Change One Tool)-(Number of Tools Used*Cost of a Tool))/Cost of a Tool. Here is an example- 0.015 = (2*(11400-80*69)-(80*3*30)-(3*80))/80.

How to calculate Total Non-Productive Time using Average Production Cost?

With Batch Size (N_b), Production Cost of Each Component (C_pr), Cost of a Tool (C_t), Machining Time (t_m), Number of Tools Used (N_t) & Time to Change One Tool (t_c) we can find Total Non-Productive Time using Average Production Cost using the formula - Non Productive Time = (Batch Size*(Production Cost of Each Component-Cost of a Tool*Machining Time)-(Cost of a Tool*Number of Tools Used*Time to Change One Tool)-(Number of Tools Used*Cost of a Tool))/Cost of a Tool.

Can the Total Non-Productive Time using Average Production Cost be negative?

No, the Total Non-Productive Time using Average Production Cost, measured in Time cannot be negative.

Which unit is used to measure Total Non-Productive Time using Average Production Cost?

Total Non-Productive Time using Average Production Cost is usually measured using the Minute[min] for Time. Second[min], Millisecond[min], Microsecond[min] are the few other units in which Total Non-Productive Time using Average Production Cost can be measured.

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