Lead Time Calculator

def lead_time(T_order, T_prod, T_transit, T_receive):
    """
    Calculate total supply-chain lead time.

    T_order:   Order processing / preparation time (days)
    T_prod:    Supplier production / manufacturing time (days)
    T_transit: Transportation / shipping time (days)
    T_receive: Receiving, inspection & put-away time (days)

    Returns:
        Total lead time (days)
    """

    if any(t < 0 for t in (T_order, T_prod, T_transit, T_receive)):
        raise ValueError("All time components must be >= 0.")

    return T_order + T_prod + T_transit + T_receive


# Example
T_order = 1
T_prod = 10
T_transit = 5
T_receive = 1

lt = lead_time(T_order, T_prod, T_transit, T_receive)

print(f"Total Lead Time: {lt:.1f} days")

function lt = lead_time(T_order, T_prod, T_transit, T_receive)
    % Calculate total supply-chain lead time
    %
    % T_order   = Order processing time (days)
    % T_prod    = Production / manufacturing time (days)
    % T_transit = Transit / shipping time (days)
    % T_receive = Receiving & inspection time (days)

    if any([T_order, T_prod, T_transit, T_receive] < 0)
        error('All time components must be >= 0.');
    end

    lt = T_order + T_prod + T_transit + T_receive;
end

% Example
T_order = 1;
T_prod = 10;
T_transit = 5;
T_receive = 1;

lt = lead_time(T_order, T_prod, T_transit, T_receive);

fprintf('Total Lead Time: %.1f days\n', lt);